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  Subjects -> ENGINEERING (Total: 2269 journals)
    - CHEMICAL ENGINEERING (190 journals)
    - CIVIL ENGINEERING (181 journals)
    - ELECTRICAL ENGINEERING (100 journals)
    - ENGINEERING (1201 journals)
    - ENGINEERING MECHANICS AND MATERIALS (389 journals)
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ENGINEERING (1201 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Full-text available via subscription   (Followers: 5)
AASRI Procedia     Open Access   (Followers: 14)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 207)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 1)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 10)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 4)
Advanced Science     Open Access   (Followers: 4)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 4)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 6)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 18)
Advances in Artificial Neural Systems     Open Access   (Followers: 3)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 25)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 9)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 18)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 7)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 40)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 34)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 1)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 4)
AIChE Journal     Hybrid Journal   (Followers: 28)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access  
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 5)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 6)
Applied Clay Science     Hybrid Journal   (Followers: 4)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 4)
Applied Sciences     Open Access   (Followers: 3)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 8)
Arkiv för Matematik     Hybrid Journal  
ASEE Prism     Full-text available via subscription   (Followers: 2)
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 7)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 9)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 3)
Batteries     Open Access   (Followers: 3)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 24)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 8)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 1)
Biotechnology Progress     Hybrid Journal   (Followers: 40)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 3)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Full-text available via subscription   (Followers: 14)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 40)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 7)
Case Studies in Thermal Engineering     Open Access   (Followers: 4)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 5)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 4)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 10)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 20)
Clay Minerals     Full-text available via subscription   (Followers: 8)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 4)
Coastal Engineering     Hybrid Journal   (Followers: 10)
Coastal Engineering Journal     Hybrid Journal   (Followers: 3)
Coatings     Open Access   (Followers: 2)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 23)
Composite Interfaces     Hybrid Journal   (Followers: 5)
Composite Structures     Hybrid Journal   (Followers: 242)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 175)
Composites Part B : Engineering     Hybrid Journal   (Followers: 215)
Composites Science and Technology     Hybrid Journal   (Followers: 159)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 12)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 25)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Computers and Geotechnics     Hybrid Journal   (Followers: 8)
Computing and Visualization in Science     Hybrid Journal   (Followers: 6)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 25)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 7)
Control Engineering Practice     Hybrid Journal   (Followers: 40)
Control Theory and Informatics     Open Access   (Followers: 7)
Corrosion Science     Hybrid Journal   (Followers: 24)
CT&F Ciencia, Tecnologia y Futuro     Open Access  
CTheory     Open Access  
Current Applied Physics     Full-text available via subscription   (Followers: 4)

        1 2 3 4 5 6 7 | Last

Journal Cover Combustion, Explosion, and Shock Waves
  [SJR: 0.348]   [H-I: 28]   [13 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0010-5082 - ISSN (Online) 1573-8345
   Published by Springer-Verlag Homepage  [2335 journals]
  • Initiation of multifuel mixtures with bifurcation structures
    • Authors: A. A. Vasil’ev; V. A. Vasiliev
      Pages: 621 - 630
      Abstract: The theory of a strong explosion is used as a basis for the development of an experimental technique for determining the source energy that ensures initiation of the combustible mixture. The technique is tested in experiments aimed at determining the critical energies of spherical detonation initiation E*3 with the use of an electric discharge for a stoichiometric acetylene–oxygen mixture and also for two-fuel mixtures (acetylene–nitrous oxide–oxygen) possessing bifurcation properties of cellular structures. The critical energy E*3 for the stoichiometric two-fuel mixture in terms of both fuels with a bifurcation structure is several-fold lower than the value of E*3 for the monofuel mixture whose cell size at a given pressure is determined by the large scale of bifurcation cells. This result testifies that the value of E*3 decreases with increasing number of “hot points,” which are numerous regions of collisions of large-scale and small-scale transverse waves in the mixture with bifurcation properties.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060010
      Issue No: Vol. 52, No. 6 (2016)
       
  • Analysis of the mechanisms of ignition and combustion of i -C 8 H 18 –H
           2 and n -C 10 H 22 –H 2 fuel blends in air
    • Authors: N. S. Titova; S. A. Torokhov; O. N. Favorskii; A. M. Starik
      Pages: 631 - 642
      Abstract: The processes of ignition and combustion of i-C8H18–H2 and n-C10H22–H2 fuel blends in air are analyzed numerically. It is demonstrated that addition of hydrogen both to normal alkane (n-C10H22) and to alkane with a branched structure (i-C8H18) leads to an increase in the ignition delay time τind if the initial temperature of the mixture T 0 is lower than a certain value T l and, vice versa, to a decrease in τind at T 0 > T l. The greater the fraction of hydrogen in the mixture, the greater the change in τind. At sufficiently high temperatures (T 0 > T h), addition of a small amount of alkane (≈2–10%) to hydrogen reduces the ignition delay time. The value of Tl depends on the pressure of the fuel–air mixture and, to a smaller extent, on the n-alkane type. The value of T h also depends on the fraction of alkane in the fuel blend. If the initial pressure is sufficiently high (10 atm and more), addition of a small amount of i-C8H18 or n-C10H22 to the hydrogen–air mixture reduces the value of τind for all values of T 0. These features are caused by intense interaction of alkane and hydrogen oxidation kinetics. It is demonstrated that fuel blends consisting of hydrogen and n-C10H22 (i-C8H18) have a higher velocity of the laminar flame and wider limits of stable combustion than the hydrocarbons themselves. Nevertheless, a noticeable increase in the laminar flame velocity is observed only for the molar fraction of hydrogen in the fuel blend greater than 50%. In this case, it becomes possible to ensure stable combustion with a smaller fraction of NO in combustion products.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060022
      Issue No: Vol. 52, No. 6 (2016)
       
  • Chemical conversion of SO 2 in low-temperature and low-pressure
           oxyhydrogen flames. 1. Kinetic analysis of the process
    • Authors: A. A. Mantashyan; E. M. Makaryan; A. A. Arutyunyan; G. M. Gevorgyan
      Pages: 643 - 650
      Abstract: The chemical conversion of SO2 to elemental sulfur in the chain oxidation of hydrogen in a low-temperature flame has been studied. The possible elementary reactions involving atoms and free radicals that may be responsible for the chemical conversion of SO2 with the formation of sulfur in the conjugate radical chain process are discussed on the basis of thermodynamic and kinetic characteristics.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060034
      Issue No: Vol. 52, No. 6 (2016)
       
  • Chemical conversion of SO 2 in low-temperature and low-pressure
           oxyhydrogen flames. 2. Mechanism of formation of elemental sulfur
    • Authors: A. A. Mantashyan; E. M. Makaryan; A. A. Arutyunyan; G. M. Gevorgyan
      Pages: 651 - 658
      Abstract: Kinetic analysis of the mechanism of chemical conversion of SO2 in the conjugate radical chain process in low-temperature and low-pressure oxyhydrogen flames has been performed. The set of possible elementary reactions is considered, and the main pathways of SO2 conversion to elemental sulfur are identified.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060046
      Issue No: Vol. 52, No. 6 (2016)
       
  • Structure and phase formation in the Ti–Al–Nb system in the
           thermal explosion mode
    • Authors: M. L. Busurina; L. M. Umarov; I. D. Kovalev; N. V. Sachkova; S. M. Busurin; S. G. Vadchenko; A. E. Sychev
      Pages: 659 - 664
      Abstract: This paper presents the results of the structure and phase formation in the Ti/Nb/2Al, Ti/Nb/2.5Al and Ti/Nb/3Al systems in the thermal explosion mode of self-propagating hightemperature synthesis. The morphology, phase composition, microstructure, and physical properties have been studied. It has been found that compounds with the highest content of aluminum have the most homogeneous composition and the lowest porosity. The main phase of the synthesis product is a phase based a solid solution of Nb in γ-TiAl.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060058
      Issue No: Vol. 52, No. 6 (2016)
       
  • Burning of the Ti + x C (1 > x > 0.5) powder and granulated
           mixtures
    • Authors: B. S. Seplyarskii; R. A. Kochetkov; S. G. Vadchenko
      Pages: 665 - 672
      Abstract: This paper describes the experiments on the burning of the Ti + 0.5C, Ti + 0.75C, and Ti + C powder and granulated mixtures. Despite the fact that there is no convective heat transfer and the contact area between the particles is small, the linear and mass burning rates of granulated compositions happened to be several times greater than in the case of powder mixtures of the same composition. The obtained experimental and computational values of the adiabatic combustion temperature were used to estimate the contribution of the radiant and conductive heat transfer in the combustion wave propagation along the granulated mixtures. The experiments with compacted samples showed that the high burning rate of the granulated mixtures is due to great velocity of the combustion wave propagation along the granule rather than the specific features of the original reagents.
      PubDate: 2016-11-01
      DOI: 10.1134/s001050821606006x
      Issue No: Vol. 52, No. 6 (2016)
       
  • Relationship between the dust flame propagation velocity and the
           combustion mode of fuel particles
    • Authors: N. I. Poletaev
      Pages: 673 - 682
      Abstract: A possibility of determining the regime of combustion of individual fuel particles on the basis of the dependence of the flame velocity on the fuel and oxidizer concentrations is considered by an example of a dust flame of microsized metal particles with diameters d 10 < 15 μm and particle concentrations from ≈1010 to 1011 m−3 in oxygen-containing media at atmospheric pressure. The combustion mode (kinetic or diffusion) is responsible for the qualitative difference in the character of the normal velocity of the flame as a function of the basic parameters of the gas suspension. The analysis of such experimental dependences for fuel-rich mixtures shows that combustion of zirconium particles (d 10 = 4 μm) in a laminar dust flame is controlled by oxidizer diffusion toward the particle surface, whereas combustion of iron particles of a similar size is controlled by kinetics of heterogeneous reactions. For aluminum particles with d 10 = 5–15 μm, there are no clearly expressed features of either kinetic or diffusion mode of combustion. To obtain more information about the processes responsible for combustion of fine aluminum particles, the flame velocity is studied as a function of the particle size and initial temperature of the gas suspension. It is demonstrated that aluminum particles under the experimental conditions considered in this study burn in the transitional mode.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060071
      Issue No: Vol. 52, No. 6 (2016)
       
  • Generation of hydrodynamic instability in the gasification region of
           propellant
    • Authors: K. O. Sabdenov
      Pages: 683 - 693
      Abstract: This paper presents the new way of the occurrence of “natural” turbulence in the Gusachenko–Zarko mechanism of negative erosion effect during the propellant burning. It is shown that the propellant gasification region can generate hydrodynamic instability if its burning rate at a constant temperature depends on the pressure. The hydrodynamic instability of the propellant combustion that decompose according to the solid phase → liquid phase → gas and solid phase → gas scheme occurs under quite different conditions. The gasification region in propellants of the first type is more inclined to instability generation than that in propellants of the second type. The hydrodynamic instability occurs if the critical value of the Reynolds number, which depends on the properties of the propellant and environmental conditions, is exceeded.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060083
      Issue No: Vol. 52, No. 6 (2016)
       
  • Ignition of a metallized composite solid propellant by a group of hot
           particles
    • Authors: D. O. Glushkov; G. V. Kuznetsov; P. A. Strizhak
      Pages: 694 - 702
      Abstract: The solid-state ignition of a metallized composite propellant (ammonium perchlorate + 14% butyl rubber +5% aluminum powder + 6% plasticizer) under local heating by several sources of limited power capacity (dimensions of the hot particle x p = 4 mm and y p = 2 mm) was studied by mathematical modeling. For the temperature of the heated steel particles and the distance between them varied in the ranges 700 < T p < 1500 K and 0.1x p < Δx < 1.5xp, respectively, the values of T p and Δx were determined for which the ignition delay corresponds to the initiation of combustion of the composite propellant by a single particle, by a plate at a constant temperature or by several particles. In the region of low initial temperatures of the local sources (T p < 1100 K), the limiting values Δx → 0.1x p and Δx > 1.5x p, were identified for which the characteristics and mechanism of ignition of the propellant by a group of heated particles can be studied using the “plate–propellant–gas” model and the “single particle–propellant–gas” model, respectively. Decreasing the distance Δx at T p < 1100 K decreases the induction period to 50% and reduces the minimum initial temperature of the source required to initiate propellant combustion from 830 to 700 K. At T p > 1100 K, the ignition of the metallized composite solid propellant by a single or several particles can be studied using relatively simple one-dimensional models of condensed material ignition by a plate at constant temperature. The variation in the ignition delay in this case is less than 5%.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060095
      Issue No: Vol. 52, No. 6 (2016)
       
  • Detonation burning of anthracite and lignite particles in a flow-type
           radial combustor
    • Authors: F. A. Bykovskii; S. A. Zhdan; E. F. Vedernikov; Yu. A. Zholobov
      Pages: 703 - 712
      Abstract: Regimes of continuous spin detonation of anthracite and lignite particles in an air flow in a radial vortex combustor 500 mm in diameter with a constant (along the radius) cross-sectional area are studied. Ground coal with a particle size of 1–12 μm is used. For transporting coal into the combustor and promoting the chemical reaction on the surface of solid particles, hydrogen or syngas is added in the ratio CO/H2 = 1/1, 1/2, or 1/3. Continuous spin detonation of two-phase mixtures of fine anthracite and lignite particles and air with addition of hydrogen up to 4% of the coal consumption rate is obtained for the first time. The amount of syngas added to coal increases with decreasing fraction of hydrogen in the syngas: 14, 21, and 27% for anthracite and 11, 20, and 29% for lignite at CO/H2 = 1/3, 1/2, and 1/1, respectively. The structure of detonation waves and the flow in their vicinity are not principally different from those observed previously for long-flame bituminous coal and charcoal. Higher detonation velocities are observed for more energy-intensive coal (anthracite). A higher pressure is obtained near the cylindrical wall of the combustor in cold runs as compared to detonation in the case with identical flow rates of the coal–air mixtures.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060101
      Issue No: Vol. 52, No. 6 (2016)
       
  • Laser initiation of PETN-based composites with additives of ultrafine
           aluminium particles
    • Authors: B. P. Aduev; D. R. Nurmukhametov; A. A. Zvekov; A. P. Nikitin; A. V. Kalenskii
      Pages: 713 - 718
      Abstract: This paper describes the study on the dependence of the critical energy density of the explosive decomposition of PETN on the mass concentration of the additives of ultrafine Al particles (100–120 nm) in the range of 0.025–1% under the influence of the first and second harmonics of a neodymium laser (12 ns, 1064 and 532 nm). It is shown that the critical energy of the explosion initiation by the first and second harmonics of the laser radiation reaches a minimum value at the same absorption rates, but different concentrations of additives. The photoacoustic method is used to show that, as the laser energy radiation is absorbed, the pressure amplitude in the heated layer reaches a maximum value when the concentration of additives corresponds to the minimum value of the critical energy density.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060113
      Issue No: Vol. 52, No. 6 (2016)
       
  • Experimental study and numerical simulation of the corner turning of TATB
           based and CL-20 based polymer bonded explosives
    • Authors: X.-L. Guo; W. Cao; Y.-L. Duan; Y. Han; J.-L. Ran; X.-J. Lu
      Pages: 719 - 726
      Abstract: In order to study the corner turning performance of detonation waves for TATB (1,3,5-triamino-2,4,6-trinitrobenzene) based and CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12- hexaazaisowurtzitane) based polymer bonded explosives (PBXs with PBX-I, PBX-II, and PBX-III modifications), mushroom tests are used to obtain the first breakout angles, failure angles, and delay times with initiating diameters of 10 and 15 mm. The results show that these parameters of PBX-I increase with an increase in the initiating diameter. The first breakout angles and failure angles of PBX-II and PBX-III are 90◦ for the initiating diameter of 10 mm, while these angles for PBX-I are 22.7 and 31.9◦ for the same initiating diameter, which implies that CL-20 based explosives have excellent corner turning performance, even with 13.5 wt.% aluminum powders added to PBX-III. Then, two-dimensional numerical simulations of PBX-I are performed by using the Lee–Tarver ignition and growth model. The computed results agree well with the measured results for all cases studied.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060125
      Issue No: Vol. 52, No. 6 (2016)
       
  • Effect of the microstructure of ammonium nitrate granules on the
           detonability of composite propellants based on it
    • Authors: S. D. Viktorov; A. E. Frantov; I. N. Lapikov; V. V. Andreev; A. V. Starshinov
      Pages: 727 - 731
      Abstract: This paper presents the result of a study of the chemical composition, physicotechnical properties, and structure of various types of granulated ammonium nitrate (high-density, porous, and aerated) made in Russia and abroad. It is shown that thermal treatment of high-density ammonium nitrate granules (Russian Standard (GOST) No. 2-2013) leads to changes in the crystal structure (porization) that increase the retention capacity with respect fuel oil. The detonation velocity of ammonium nitrate/fuel oil compositions based on aerated ammonium nitrate was measured.
      PubDate: 2016-11-01
      DOI: 10.1134/s0010508216060137
      Issue No: Vol. 52, No. 6 (2016)
       
  • Stabilization of diffusion flames of impacting and opposing fuel jets
    • Authors: V. K. Baev; A. N. Bazhaikin
      Pages: 514 - 523
      Abstract: Stability of diffusion combustion of fuel jets impacting on targets and interaction of two jets (pure propane–butane and the same fuel with addition of carbon dioxide) are experimentally studied. Data on combustion failure are obtained for various variants of jet interaction, as well as information about the composition of combustion products, air-to-fuel ratio, and completeness of combustion before combustion failure. It is shown that the domain of stable combustion of impacting and opposing jets is expanded by more than an order of magnitude as compared to combustion of individual free jets.
      PubDate: 2016-09-01
      DOI: 10.1134/s0010508216050026
      Issue No: Vol. 52, No. 5 (2016)
       
  • Catalytic oxidation of methane on CuO/Al 2 O 3 /FeAlO/FeAl cermet
           catalysts
    • Authors: S. F. Tikhov; Yu. N. Bespalko; V. A. Sadykov; A. N. Salanov; S. I. Reshetnikov
      Pages: 535 - 543
      Abstract: The activity of plates of CuO/Al2O3/FeAlO/FeAl structured cermet catalysts is compared by varying their alumina content. The catalysts were prepared by impregnation of cermet supports obtained by mechanochemical activation of powder mixtures of an alumina precursor [20–50% (wt.)], iron, and aluminum, followed by hydrothermal treatment and calcination. It is shown that increasing the content of the alumina precursor (product of thermal activation of gibbsite) increases the specific surface area of the support and the mesopore and macropore volumes and reduces its mechanical strength. The content of the active component (CuO) also increases, resulting in an increase in the specific activity of catalyst despite a reduction in the effectiveness of using the active component. The activity of catalysts with a moderate concentration of alumina is sufficient to initiate methane oxidation.
      PubDate: 2016-09-01
      DOI: 10.1134/s001050821605004x
      Issue No: Vol. 52, No. 5 (2016)
       
  • Transformation of the thermal regimes of exothermic reactions in the case
           of harmonic perturbations of the velocity and temperature of reagents at
           the entrance of the adiabatic reactor
    • Authors: A. A. Butakov; E. N. Shatunova; A. Yu. Kostin
      Pages: 544 - 549
      Abstract: The physical concepts and the results of the thermal theory of combustion are used as a basis for the qualitative analysis and mathematical simulation of transformation of stationary temperature distributions along the length of an adiabatic reactor in the case of periodic perturbations of the velocity of the reagent in the reactor and its temperature at the entrance of the reactor. It is established that, with certain values of the amplitude and frequency of harmonic perturbations of the velocity of the reagent, it is possible to improve the thermal stability of the process (increase the pre-explosion heating).
      PubDate: 2016-09-01
      DOI: 10.1134/s0010508216050051
      Issue No: Vol. 52, No. 5 (2016)
       
  • Combustion of carbonized coal residue in water–oxygen supercritical
           fluid
    • Authors: A. A. Vostrikov; O. N. Fedyaeva; D. Yu. Dubov; A. V. Shishkin; M. Ya. Sokol
      Pages: 562 - 565
      Abstract: The autothermal regime of partial oxidation of carbonized coal residue in a stream of water-oxygen fluid at 923 K and 30 MPa is implemented for the first time. It is revealed that the oxidation of coal residue and the formation of combustible gases (hydrogen content in the products is increased by 26% with respect to its amount in the original sample) occur simultaneously and are caused by the participation of the H2O molecules in the redox reactions.
      PubDate: 2016-09-01
      DOI: 10.1134/s0010508216050075
      Issue No: Vol. 52, No. 5 (2016)
       
  • On mixing of the products of detonation of composite explosives in the
           chemical reaction region
    • Authors: V. V. Mitrofanov; V. M. Titov
      Pages: 587 - 592
      Abstract: The problem of mixing of the products of detonation of composite explosives is of principal importance for the synthesis of ultrafine diamond from composite mixtures and also for chemistry of detonation processes as a whole. An analysis of mixing in the chemical reaction region due to molecular diffusion shows that this mechanism may be important only for grain sizes of several micrometers. If the grain sizes reach tens or hundreds of micrometers, only partial mixing on the grain boundaries is possible. Investigations of the hydrodynamic mechanism of mixing shows that it may occur owing to a nonuniform velocity field behind the detonation wave front in the mixture and to the development of turbulence and cumulative processes during pore implosion. In mixtures with grain sizes of the order of 30 μm, these processes can lead to appreciable mixing during the time of ≈0.5 μs and longer. Theoretical estimates are compared with the results of experiments performed at the Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences and at the Altai Scientific and Industrial Enterprise (Biisk) for studying the synthesis of ultrafine diamond with the use of the isotope method.
      PubDate: 2016-09-01
      DOI: 10.1134/s0010508216050099
      Issue No: Vol. 52, No. 5 (2016)
       
  • Laser initiation of compositions based on PETN with submicron coal
           particles
    • Authors: B. P. Aduev; D. R. Nurmukhametov; N. V. Nelyubina; R. Yu. Kovalev; A. P. Nikitin; A. N. Zaostrovskii; Z. R. Ismagilov
      Pages: 593 - 599
      Abstract: This paper describes the results of experiments on laser initiation of composites based on PETN and inclusions of submicron coal particles. The thresholds and kinetic characteristics of explosion of mixed compositions based on PETN and inclusions of submicron coal particles (brown coal B and parabituminous coal P) are studied under the impact of neodymium laser (1064 nm; 12 ns), depending on the mass concentration of inclusions in the range of 0–5%. It is shown that the minimum threshold of explosive decomposition of PETN equal to 1.1 J/cm2 can be achieved if the concentration of both types of inclusions is 0.5%.
      PubDate: 2016-09-01
      DOI: 10.1134/s0010508216050105
      Issue No: Vol. 52, No. 5 (2016)
       
  • Specific features of the transformation of spall cracks to localized shear
           bands
    • Authors: S. N. Buravova; E. V. Petrov; A. S. Shchukin
      Pages: 613 - 620
      Abstract: Investigations of specific features of the microstructure of the region where a spall crack transforms to an adiabatic shear band are based on a spall model of strain localization, which implies that adiabatic shear bands are induced by interference of unloading waves, and the value of the negative stress in the expansion region of these waves does not exceed the dynamic strength of the material. It is shown that the transformation region contains a tremendous number of dislocation ensembles, which is much greater than the number of dislocation ensembles generated by a shock wave. Detection of micrometer-sized fracture sites in the region of interference of unloading waves implies that small fracture sites are formed in a polycrystalline material on dislocations arising in the course of dynamic tension.
      PubDate: 2016-09-01
      DOI: 10.1134/s0010508216050129
      Issue No: Vol. 52, No. 5 (2016)
       
 
 
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