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ENGINEERING (1199 journals)                  1 2 3 4 5 6 | 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: 15)
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: 216)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
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: 5)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
Advances in Artificial Neural Systems     Open Access   (Followers: 4)
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: 19)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 23)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
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: 12)
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: 35)
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   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 27)
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: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 8)
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: 7)
Applied Network Science     Open Access  
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
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: 7)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
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: 8)
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: 23)
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: 9)
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: 3)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 1)
Biotechnology Progress     Hybrid Journal   (Followers: 38)
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: 13)
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: 3)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
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: 3)
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: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 21)
Clay Minerals     Full-text available via subscription   (Followers: 9)
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: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 4)
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: 6)
Composite Structures     Hybrid Journal   (Followers: 252)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 177)
Composites Part B : Engineering     Hybrid Journal   (Followers: 222)
Composites Science and Technology     Hybrid Journal   (Followers: 165)
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: 8)
Control Engineering Practice     Hybrid Journal   (Followers: 41)
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  

        1 2 3 4 5 6 | 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  [2329 journals]
  • Ignition of a two-fuel hydrogen–silane mixture in air
    • Authors: D. A. Tropin; A. V. Fedorov
      Pages: 1 - 7
      Abstract: Based on the previously developed model of detailed kinetics, the ignition delay time of two-fuel hydrogen–silane–air mixtures is calculated. The effect of the silane concentration and the temperature of the mixture on the ignition delay time is determined. It is shown that addition of a small (within 20%) amount of silane to the hydrogen–air mixture in the temperature range from 1200 to 2500 K leads to significant reduction of the ignition delay time of the mixture, whereas there is only a minor decrease in mixtures with silane concentrations higher than 20%.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010014
      Issue No: Vol. 53, No. 1 (2017)
  • What is burning in coal mines: Methane or coal dust?
    • Authors: A. A. Vasil’ev; A. V. Pinaev; A. A. Trubitsyn; A. Yu. Grachev; A. V. Trotsyuk; P. A. Fomin; A. V. Trilis
      Pages: 8 - 14
      Abstract: Possible scenarios of ignition and explosion development in coal mines are discussed. A principal possibility of complete quenching of detonation and combustion with the use of a sheet consisting of inert particles is experimentally demonstrated. As the detonation quenching process is rather complicated, it is recommended to focus the attention at the initial stage of ignition of the methane–air mixture, when it is possible to ensure effective quenching of the ignition site by using methods of advanced automatic monitoring and control with clear satisfaction of space and time requirements.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010026
      Issue No: Vol. 53, No. 1 (2017)
  • Ignition and combustion of pyrotechnic compositions based on microsized
           and ultra-nanosized aluminum particles in a moist medium in a two-zone gas
    • Authors: D. A. Yagodnikov; A. V. Ignatov; E. I. Gusachenko
      Pages: 15 - 23
      Abstract: This paper presents the results of an experimental study of the ignition and combustion of pyrotechnic compositions based on microsized and ultra-nanosized aluminum particles in a model two-zone gas generator using water as oxidizer. The flow of combustion products from the gas generator was video recorded, and the condensed products sampled behind the nozzle exit were studied by chemical and particle-size analyses. It was found that the replacement of microsized aluminum particles by ultra-nanosized particles in the samples led to a ≈17% decrease in the active aluminum content in the condensed phase, a 10–15% increase in the efficiency of the process in the gas generator (completeness of conversion of the pyrotechnic composition to combustion products), and a factor of about three decrease in the ignition delay.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010038
      Issue No: Vol. 53, No. 1 (2017)
  • Effect of the configuration of the rear wall of the cavity on combustion
           in a supersonic combustor
    • Authors: M. A. Goldfeld; A. V. Starov
      Pages: 24 - 31
      Abstract: Results of an experimental study of a supersonic combustor with a solid (continuous) and discrete (discontinuous) rear wall of the cavity are reported. The tests are performed in a short-duration wind tunnel with an attached pipeline at the entrance Mach number of 3, total temperatures of 2550–3140 K, and static pressures of 178–195 kPa. Heated kerosene is used as a fuel. Data on ignition conditions and kerosene combustion efficiency are obtained for different cavity configurations. The drag of internal elements of the combustor, which form recess stabilizers, is estimated. An overall advantage of the combustor with a discrete rear wall of the cavity over a solid rear wall is demonstrated.
      PubDate: 2017-01-01
      DOI: 10.1134/s001050821701004x
      Issue No: Vol. 53, No. 1 (2017)
  • Stabilization of a lifted diffusion hydrocarbon flame by an external
           periodic electric field
    • Authors: A. V. Tupikin; P. K. Tretyakov; V. S. Venediktov
      Pages: 32 - 35
      Abstract: Results of studying the influence of periodic application of a weak electric field on diffusion combustion of gaseous hydrocarbons are presented. The main attention is paid to investigating the effect of the electric field parameters on flame stabilization. Two types of electric fields are considered: (1) with a pulsed-periodic variation of the field strength in time and a constant configuration of force lines (pulsed-periodic electric field); (2) with a change in the field configuration in time and a constant field strength (electric field with a time-varying configuration). Direct photo and video recording was used, as well as spectrozonal registration of the natural luminescence of the flame (at wavelengths of emission of excited radicals OH* and CH*). It is shown that the region of flame stabilization (ignition point) tends to the place with the maximum strength of the electric field. The effect of the electric field with a time-varying configuration on combustion is the flame stabilization in the plane of electrodes and local intensification of combustion.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010051
      Issue No: Vol. 53, No. 1 (2017)
  • Ignition and unstable regimes of gasless combustion of a disk-shaped
    • Authors: V. G. Prokof’ev; V. K. Smolyakov
      Pages: 36 - 40
      Abstract: The effect of ignition conditions and the parameters of the melting of the inert component on unstable combustion modes is studied numerically using a model of solid-flame combustion of a disk. It is shown that the shape of the heated region initiating combustion of the disk determines the number and trajectories of hotspots of the self-propagating combustion zone. The effect of the phase transition on the combustion characteristics is the more pronounced the closer the phase transition temperature to the combustion temperature. In this case, the combustion front takes the shape of a ring.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010063
      Issue No: Vol. 53, No. 1 (2017)
  • Structure and properties of a composite material obtained by thermal
           explosion in a mixture of Ni + Al + Cr 2 O 3
    • Authors: O. D. Boyarchenko; A. E. Sychev; L. M. Umarov; A. S. Shchukin; I. D. Kovalev; M. A. Sichinava
      Pages: 41 - 48
      Abstract: The synthesis of a composite material by thermal explosion in a reaction mixture of Ni + Al + Cr2O3 was studied. The thermodynamic parameters of combustion of the systems studied were estimated to predict the composition of the inorganic products (condensed or gaseous) of self-propagating high-temperature synthesis and calculate the adiabatic combustion temperature. It is shown that the synthesis process involves competing reactions in the sample volume which are responsible for the formation of a multiphase product. The influence of the content of Cr2O3 in the reaction system on the strength characteristics of the product synthesis was studied. The microstructure of the synthesized samples was examined, and their micro-hardness, toughness and residual porosity were determined. The possibility of obtaining a homogeneous material based on NiAl intermetallic compound containing dissolved chromium and chromium oxide nanoparticles is shown.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010075
      Issue No: Vol. 53, No. 1 (2017)
  • Some features of the dielectric relaxation of nitroglycerin
    • Authors: D. N. Sadovnichii; Yu. M. Milekhin; S. A. Malinin; I. D. Voropaev
      Pages: 49 - 54
      Abstract: This paper presents the results of an experimental study of the dielectric relaxation of nitroglycerin in the temperature range of the liquid–solid phase transition. Measurements were performed in the electric field frequency range of 1–1264 MHz. It is shown that the dielectric relaxation of nitroglycerin includes at least two relaxation process. Possible factors that determine the temperature and frequency dependences of the complex dielectric permittivity of nitroglycerin are discussed.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010087
      Issue No: Vol. 53, No. 1 (2017)
  • Composition and characteristics of primary combustion products of
           boron-based propellants
    • Authors: J. Liu; D. Liang; J. Xiao; B. Chen; Ya. Zhang; J. Zhou; K. Cen
      Pages: 55 - 64
      Abstract: Primary combustion products of boron-based propellants are incomplete combustion products that are emitted from the gas generator of a solid ducted rocket. Studying the composition of primary combustion products provides valuable information about the primary combustion process and also helps to better understand the secondary combustion process. The particle size of the primary combustion products is analyzed by a laser particle size analyzer. The qualitative analysis of the sample composition is performed by using x-ray diffraction, x-ray photoelectron spectroscopy, and thermogravimetry–differential scanning calorimetry experiments. Based on these results, an integrated quantitative analysis of the sample composition is conducted. The quantitative analysis methods include tube furnace heating, ion chromatography, infrared spectroscopy, and inductively coupled plasma chromatography. In addition, scanning electron microscopy and energy dispersive spectrometry are also used to analyze the micro-morphology and distribution of different components in the sample. The primary combustion products mainly contain B, C, B m C n , H3BO3, B2O3, BN, Mg, MgCl2, and NH4Cl. B m C n (22–24%), H3BO3 (20%), and B (16.8%) are the three major components, while B m C n , B, and C (9.8–11.8%) are the three combustible components present in the highest amounts. The oxidant NH4ClO4 is completely consumed during the primary combustion, while the metal additive Mg does not show much reactivity. The micro-morphology and distribution of B m C n , H3BO3 (or B2O3), B, Mg, and C in the sample are investigated. Some components in the primary combustion products are found to be agglomerated, while some components are dispersed. Large particles in the sample mainly include B and Mg, while B m C n , H3BO3 (or B2O3), and C particles are small. In general, the combustion completeness of the primary combustion products is rather low. Therefore, better understanding and controlling of the secondary combustion process is very important to improve the performance of B-based propellants.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010099
      Issue No: Vol. 53, No. 1 (2017)
  • Pressure measurement by fast-response piezo-electric sensors during
           continuous spin detonation in the combustor
    • Authors: F. A. Bykovskii; S. A. Zhdan; E. F. Vedernikov; A. N. Samsonov; A. I. Sychev; A. E. Tarnaikin
      Pages: 65 - 73
      Abstract: Pressure profiles in a transverse detonation wave propagating in a plane-radial vortex chamber during continuous spin detonation of a mixture consisting of lignite, syngas, and air are measured by specially designed and fabricated high-frequency pressure sensors based on TsTS-19 piezo-ceramics. Pressure levels in the detonation wave front relative to the mean static pressure are determined. It is demonstrated that these levels decrease toward the combustor center (by a factor of 20 and lower) as the wave intensity (velocity) decreases. Pressure oscillations behind the wave front testify to a complex gas-dynamic pattern of the processes in the wave region. A chemical reaction region is detected behind the wave front; its length is approximately 8% of the period between the waves.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010105
      Issue No: Vol. 53, No. 1 (2017)
  • Instability of detonation waves in FEFO/methanol solutions
    • Authors: A. V. Utkin; V. M. Mochalova; S. I. Torunov; S. A. Koldunov
      Pages: 74 - 81
      Abstract: A VISAR interferometer and a high-speed streak camera are used to study the structure of detonation waves in bis-(2-fluoro-2,2-dinitroethyl)-formal (FEFO) mixtures with methanol, whose mass concentration varied in the range of 0–35%. It is shown that the two types of instability existing in liquid explosives, which are the one-dimensional instability of the detonation front and the reaction failure wave instability on the edge of the charge, can be implemented in any combination. The reaction time of the studied mixtures is determined, and the different character of the dependence of the critical diameter of detonation and the reaction time on the diluent concentration is demonstrated.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010117
      Issue No: Vol. 53, No. 1 (2017)
  • Effect of multiple scattering on the critical density of the energy used
           to initiate a PETN–aluminum compound by a neodymium laser pulse
    • Authors: A. V. Kalenskii; A. A. Zvekov; M. V. Anan’eva; A. P. Nikitin; B. P. Aduev
      Pages: 82 - 92
      Abstract: The radiative transfer equation and the Mie theory are used in this paper to determine the optical properties of PETN–aluminum nanoparticles compounds. In the case of laser initiation with a wavelength of 1064 nm, the illumination gain at a depth of 100 μm from the surface of the sample varies in the range of 1.070–3.308 for nanoparticles with radii of 20–200 nm. The minimum of the relationship between the density of the energy required to initiate an explosive decomposition and the mass fraction of nanoparticles can be determined by the maximum illumination gain in the sample. The relationships between the critical density of the energy required to initiate PETN–aluminum nanoparticles compounds by the pulses of the first and second harmonics of a neodymium laser and the nanoparticle radius with account for multiple light scattering are determined. It is shown that account for multiple light scattering improves the agreement between theory and experiment.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010129
      Issue No: Vol. 53, No. 1 (2017)
  • Coagulation of carbon clusters in a detonation wave
    • Authors: V. V. Danilenko
      Pages: 93 - 102
      Abstract: The effect of the parameters of a charge of TNT/RDX alloys and their detonation conditions on the coagulation of carbon on the isentrope of the detonation products is analyzed. In the region of liquid nanocarbon, coagulation occurs by coalescence of nanodroplets and in the region of solid nanocarbon, by their joining (sintering) simultaneously with crystallization. Therefore, the specific surface area of nanodiamonds calculated from their sizes is always larger than the measured value. Separation of nanodroplets in detonation products accelerates their coagulation and cooling due to the flow of cooler products around them. Evaluation of the distance between the surfaces of nanodroplets in various TNT/RDX alloys shows that they are small, smaller than nanodroplets. The conditions of rapid coalescence of nanodroplets during different deceleration of the products by rigid barriers are analyzed. An increase of up to five orders of magnitude in the size of diamond particles was established experimentally. The factors responsible for the change in the coagulation rate with the transition from heterogeneous to homogeneous TNT/RDX alloy with decreasing size of TNT/RDX particles are discussed.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010130
      Issue No: Vol. 53, No. 1 (2017)
  • Dynamic model of the growth and collapse of pores in liquids and solids
    • Authors: M. A. Desyatnikova; O. N. Ignatova; V. A. Raevskii; I. S. Tselikov
      Pages: 103 - 109
      Abstract: A model for the spall fracture and compaction of a damaged material based on a description of the motion of a single pore is proposed. The model takes into account the strength properties, the effect of pressure, surface tension, and viscosity of materials and inertial forces. Equations describing the dynamics of growth and collapse of pores are presented. The proposed model can be used to calculate the spall fracture and compaction of liquids and metals in both solid and liquid (molten) states.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010142
      Issue No: Vol. 53, No. 1 (2017)
  • Mechanics of penetration of ceramic targets
    • Authors: I. F. Kobylkin
      Pages: 110 - 115
      Abstract: A model for the penetration of a ceramic target with the formation of an expanding conical hole is proposed that can be used to determine the apex angle of the cone knocked out from the target. The main cause of this fracture of ceramic targets is that the tensile strength of a ceramic material is much lower than its compressive strength. A method for calculating the maximum penetration velocity in a ceramic target without substrate was developed using the energy fracture criterion for ceramics. Two-dimensional numerical simulation of the impact of a steel projectile on a corundum plate showed satisfactory agreement between the calculated and experimental configurations of the resulting conical crack provided that the ratio between the compressive and tensile strengths corresponds to the recommendations of the developed model.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010154
      Issue No: Vol. 53, No. 1 (2017)
  • Experimental and numerical study of the impact interaction of a rigid
           impactor with a combined target
    • Authors: V. V. Balandin; A. M. Bragov; S. V. Zefirov; A. K. Lomunov
      Pages: 116 - 121
      Abstract: This paper describes the experimental and numerical study of structures used for protection against the harmful effect of bullet and fission elements. A special place among them is taken by spaced-apart structures in which a gap between layers is filled with either air or various light materials with good damping, dissipative, and thermophysical properties. The results of the numerical simulation of a fragment of spaced-apart protection are in good agreement with experimental data on both residual forms and deflection.
      PubDate: 2017-01-01
      DOI: 10.1134/s0010508217010166
      Issue No: Vol. 53, No. 1 (2017)
  • 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)
  • 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)
  • 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)
  • 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)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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Fax: +00 44 (0)131 4513327
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