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  Subjects -> ENGINEERING (Total: 2268 journals)
    - CHEMICAL ENGINEERING (190 journals)
    - CIVIL ENGINEERING (183 journals)
    - ELECTRICAL ENGINEERING (103 journals)
    - ENGINEERING (1201 journals)
    - ENGINEERING MECHANICS AND MATERIALS (380 journals)
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    - MECHANICAL ENGINEERING (89 journals)

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: 17)
AAPG Bulletin     Hybrid Journal   (Followers: 7)
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: 246)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
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: 11)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 6)
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 8)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
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: 16)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 10)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 22)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 26)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 29)
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: 41)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 37)
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: 31)
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: 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: 17)
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: 16)
Applied Clay Science     Hybrid Journal   (Followers: 5)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access   (Followers: 1)
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: 3)
Asia-Pacific Journal of Science and Technology     Open Access  
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: 8)
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: 8)
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: 5)
Batteries     Open Access   (Followers: 5)
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: 4)
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: 10)
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: 17)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 32)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 9)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
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: 9)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 22)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 43)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 8)
Case Studies in Thermal Engineering     Open Access   (Followers: 4)
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: 7)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 8)
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: 22)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 5)
Coatings     Open Access   (Followers: 4)
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: 26)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 265)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 185)
Composites Part B : Engineering     Hybrid Journal   (Followers: 277)
Composites Science and Technology     Hybrid Journal   (Followers: 182)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 14)
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: 7)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 28)
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: 10)
Computing and Visualization in Science     Hybrid Journal   (Followers: 5)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 30)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 7)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 9)
Control Engineering Practice     Hybrid Journal   (Followers: 42)
Control Theory and Informatics     Open Access   (Followers: 8)
Corrosion Science     Hybrid Journal   (Followers: 25)
CT&F Ciencia, Tecnologia y Futuro     Open Access   (Followers: 1)
CTheory     Open Access  

        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  [2352 journals]
  • Combustion chemistry of ternary blends of hydrogen and C 1 –C 4
           hydrocarbons at atmospheric pressure
    • Authors: D. A. Knyazkov; V. M. Shvartsberg; A. M. Dmitriev; K. N. Osipova; A. G. Shmakov; O. P. Korobeinichev; A. Burluka
      Pages: 491 - 499
      Abstract: Interest in the combustion chemistry of multifuel blends is motivated by the need to study the combustion of natural gas, which is known to be a mixture of alkanes. The present study performed using molecular beam mass spectrometry and numerical modeling has shown that the width of the zones of hydrogen and methane consumption in the H2/CH4/C3H8/O2/Ar flame and the width of the zones of methane and propane consumption in the CH4/C3H8/C4H10/O2/Ar flame differ significantly from each other. The causes of this phenomenon were determined by analyzing the modeling results. It has been found that in the presence of heavier compounds, lighter fuels, such as H2 and CH4, are formed, which reduces the total rate of their consumption and, hence expands the zone of their consumption in the flame. The influence of the presence of hydrogen in the fuel mixture on the concentration of C2 hydrocarbons has also been studied. It has been established that the addition of hydrogen reduces the maximum concentration of ethane, ethylene, and acetylene in the flame, and the fraction of unsaturated C2 hydrocarbons with respect to saturated ones also decreases.
      PubDate: 2017-09-01
      DOI: 10.1134/s001050821705001x
      Issue No: Vol. 53, No. 5 (2017)
       
  • Study on flame structures and emissions of CO and NO in Various CH 4 /O 2
           /N 2 –O 2 /N 2 counterflow premixed flames
    • Authors: J. Luo; L. Tian; L.-Sh. Liu; Z.-Zh. Cheng
      Pages: 500 - 509
      Abstract: An oxygen-diluted partially premixed/oxygen-enriched supplemental combustion (ODPP/OESC) counterflow flame is studied in this paper. Flame images are obtained through experiments and numerical simulations with the GRI-Mech 3.0 chemistry. The oxygen dilution effects are revealed by comparing the flame structures and emissions with those of a premixed flame and partially premixed flame (PPF) at the same equivalence ratio (ϕΣ = 0.95 and ϕ f = 1.4). The results show that both PPF and ODPP/OESC flames have distinct double flame structures; however, the location of the premixed combustion zone and the distance between premixed/nonpremixed combustion zone are significantly different for these two cases. For the ODPP/OESC flame, the temperature in the premixed combustion zone is lower and the premixed zone itself is located farther downstream from the fuel nozzle, which leads to reduction of NO and CO emissions, as compared to those of the PPF. Therefore, by adjusting the distribution of the oxygen concentration in the premixed and nonpremixed combustion zones, the ODPP/OESC can effectively balance the chemical reaction rate in the entire combustion zone and, consequently, reduce emissions.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050021
      Issue No: Vol. 53, No. 5 (2017)
       
  • Gas self-ignition in a plane vortex chamber
    • Authors: D. V. Voronin
      Pages: 510 - 516
      Abstract: This paper describes the numerical modeling of gas flow in a plane vortex chamber by using the Navier–Stokes equations. The model is based on the laws of conservation of mass, momentum, and energy for nonstationary two-dimensional compressible gas flow in the case of axial symmetry with a tangential component of the gas velocity. The processes of viscosity, thermal conductivity, and turbulence are accounted for. It is shown that the transition of the kinetic energy of gas into thermal energy as a result of transfer processes leads to the formation of hot spots in the boundary layers near the walls of the chamber. The gas temperature at these hot spots can exceed the gas combustion temperature, while the gas remains rather cold in the neighboring regions. This could be the reason for the cold gas self-ignition observed in the experiments. The turbulence of the flow and the processes of mixing and diffusion of the components make a significant contribution to the capacity of gas self-ignition.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050033
      Issue No: Vol. 53, No. 5 (2017)
       
  • Area Rules for the diffusion flame of a moving Bunsen burner corresponding
           to different temperature ranges
    • Authors: B. Lou; Y. Wang; X. F. Long; F. Tian
      Pages: 517 - 525
      Abstract: A high-speed camera system is used to observe the diffusion flame of a Bunsen burner in linear motion. The resultant sequence of instantaneous motion pictures of the flame accelerating at 3.60 m/s2 is processed and used to study the change in the flame area and specific floor area of the flame over different temperature ranges. The results indicate that the total flame area increases in the fuel control zone as the velocity increases over the range of experimental speeds employed (<0.90 m/s); then the total area quickly decreases in the transition region and is stable in the cross-flow wind control zone. As the velocity of the fire source increases, the low-temperature and specific floor areas adopt more dominant positions in the low-speed fuel control zone. In the high-speed cross-flow wind control zone, the area of the high-temperature zone and specific floor area take the dominant positions. The transformation between the two situations occurs in the transition zone. The cross-flow wind increases the high-temperature specific floor area of the fire compared to that of a stationary fire; the consumption in the moving fire also becomes correspondingly more concentrated and fierce.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050045
      Issue No: Vol. 53, No. 5 (2017)
       
  • Numerical and experimental study of fuel pre-injection in the inlet of a
           high-velocity air-breathing engine
    • Authors: V. A. Vinogradov; A. Yu. Makarov; I. V. Potekhina; V. V. Stepanov
      Pages: 526 - 537
      Abstract: The effect of preliminary injection (pre-injection) of a gas (heated air, methane, or ethylene) ahead of the entrance of a three-dimensional inlet in a supersonic flow with Mach numbers M∞ = 2–4, stagnation temperature T * = 300 K, and flow rates of the injected gas corresponding to 0–6% of the flow rate of air through the inlet is numerically studied. The gas is injected through orifices located behind the base surfaces of pylons mounted upstream of the inlet entrance. The computations are performed by the ESI-FASTRAN software package, which allows one to calculate three-dimensional viscous turbulent gas flows by a time-dependent method with the use of the Reynolds-averaged Navier–Stokes equations. Experimental investigations of pre-injection are performed with the use of small-scale and large-scale inlet models at M∞ = 3–4 and 6. A positive effect of pre-injection on stable (without stalling) deceleration of the incident flow in the case of mass supply and on initiation of ignition and stable combustion in the combustion chamber is confirmed.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050057
      Issue No: Vol. 53, No. 5 (2017)
       
  • Thermal explosion in closed systems: Criteria and critical conditions
    • Authors: V. Yu. Filimonov; K. B. Koshelev
      Pages: 538 - 547
      Abstract: A new criterion for thermal explosion in exothermically reacting systems for the case of arbitrary one-step conversions is proposed. The computation method is based on the analysis of the equation of maximum temperatures obtained for closed systems taking into account reactant consumption. The dependence of the maximum temperature on the Semenov and Todes parameters is bistable and the critical conditions are determined by the extremum conditions on the relevant parametric diagrams. The demarcation lines of ignition in the Todes criterion–Semenov criterion parametric plane are calculated for second-order exothermic reactions. Comparison of numerical and analytical calculations shows that they are in satisfactory agreement.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050069
      Issue No: Vol. 53, No. 5 (2017)
       
  • Simulation of thermal explosion in a pre-activated 3Ni + Al mixture
    • Authors: O. V. Lapshin; V. K. Smolyakov
      Pages: 548 - 553
      Abstract: The mathematical model of thermal explosion and synthesis of products in a mechanically activated 3Ni + Al mixture is simulated in macroscopic approximation. It is shown that activation of original components significantly increases the formation rate of a Ni3Al intermetallide. The experimental data are used to determine the thermophysical and kinetic constants of the process.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050070
      Issue No: Vol. 53, No. 5 (2017)
       
  • Determination of the transfer coefficient of natural turbulence occurring
           near the solid-propellant gasification zone. I. Two-phase model of the
           gasification zone
    • Authors: K. O. Sabdenov; M. Erzada
      Pages: 554 - 564
      Abstract: A model for solid propellant gasification is proposed which contains a two-phase medium in an intermediate stage. The formation of the gas phase proceeds in two ways: chemical reactions result in gaseous products, which, in turn, initiate the formation of bubbles in which vapor forms from the liquid phase of the propellant. Gaseous products play an important role only in the very early stage of bubble development; their critical pressure is used to determine the minimum size of gas-phase nuclei. The bubble volume grows primarily by evaporation of the liquid phase. A kinetic equation for the bubble concentration and the necessary boundary conditions are formulated. Arguments are given suggesting that a temperature maximum cannot occur in the gasification zone and that natural turbulence can be generated by collapsing bubbles. The sound produced by solid propellant combustion is explained by the collapse of a huge number of microscopic bubbles. If the processes in the two-phase zone are neglected, the formulated system of equations is transformed into the Belyaev–Zel’dovich model equations.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050082
      Issue No: Vol. 53, No. 5 (2017)
       
  • Molecular beam mass spectrometry of solid propellant combustion products
           at a pressure of 40 atm
    • Authors: L. V. Kuibida
      Pages: 565 - 568
      Abstract: Solid propellant combustion products at a pressure of 40 atm have been studied by molecular beam mass spectrometry. A facility with a four-stage molecular beam formation system has been designed. The possibility of quantifying the composition of the combustion products is shown using as an example a composite fuel based on ammonium dinitramide and polycaprolactone.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050094
      Issue No: Vol. 53, No. 5 (2017)
       
  • Calculation of pressure in a solid-propellant rocket motor with the use of
           a real dependence of the solid propellant burning rate on pressure
    • Authors: A. M. Lipanov
      Pages: 569 - 573
      Abstract: Five variants of calculating the burning rate of a solid propellant as a function of the pressure in a solid-propellant rocket motor are considered. Two variants of analytical expressions are proposed for approximating real dependences. In all variants, the pressure in the rocket motor can be presented by simple analytical expressions as a function of solid propellant parameters, charging conditions, and structural factors of the charge and motor.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050100
      Issue No: Vol. 53, No. 5 (2017)
       
  • Combustion of a high-calorific thermite mixture on the surface of a
           titanium substrate
    • Authors: D. E. Andreev; D. M. Ikornikov; V. I. Yukhvid; V. N. Sanin
      Pages: 574 - 579
      Abstract: The combustion and chemical transformation of highly exothermic MoO3/NiO/Al/C andMoO3/NiO/Al/B mixtures on the surface of a titanium substrate under centrifugal acceleration are studied. It is shown that chemical reactions occur not only in the combustion wave, but also on the surface of the titanium substrate, between the combustion products and the substrate material (titanium). The dynamics and mechanism of formation of layered (gradient) titanium–ceramics materials (Mo–Ni–C–Ti or Mo–Ni–B–Ti) is investigated.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050112
      Issue No: Vol. 53, No. 5 (2017)
       
  • Autowave chemical transformations of highly exothermic mixtures based on
           niobium oxide with aluminum
    • Authors: V. I. Yukhvid; D. E. Andreev; V. N. Sanin; N. V. Sachkova
      Pages: 580 - 584
      Abstract: Composite materials based on Nb with functional (Si, C, B) and alloying dopants (Hf, Ti, Al, etc.) are promising materials for aircraft engine applications. Our previous studies have shown that such composites can be synthesized in the autowave mode (combustion mode) using highly exothermic mixtures of Nb2O5 with Al, Si, Hf, and Ti. It has been found that in the combustion wave, Hf actively participates in the reduction of Nb2O5, which complicates its introduction into the composite material and leads to an excess of Al in the alloy. In the present study, we investigated the possibility of replacing Hf in the starting mixture by less active HfAl3 and also determined the effect of the grain size of HfAl3 on the Hf content in the composite material.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050124
      Issue No: Vol. 53, No. 5 (2017)
       
  • Exit of a heterogeneous detonation wave into a channel with linear
           expansion. I. Propagation regimes
    • Authors: A. V. Fedorov; T. A. Khmel’; S. A. Lavruk
      Pages: 585 - 595
      Abstract: Propagation of a plane detonation wave in a stoichiometric mixture of a gas and aluminum particles in a plane channel with a linear expansion section is studied by methods of numerical simulation. The slope of the wall is varied from 15 to 60°. The basic regimes of detonation propagation are analyzed: supercritical (without detonation failure), critical (with partial failure and re-initiation), and subcritical (with complete separation of the shock front and combustion front and with detonation failure). The detonation configuration formed in the expanding section can be a cellular structure with large differences in cell sizes at large angles of expansion or a close-to-uniform structure at the wall angle of 15°.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050136
      Issue No: Vol. 53, No. 5 (2017)
       
  • Synthesis, molecular dynamic simulation, and density functional theory
           insight into the cocrystal explosive of
           2,4,6-trinitrotoluene/1,3,5-trinitrobenzene
    • Authors: P. Ma; Ya.-T. Jin; P.-H. Wu; W. Hu; Y. Pan; X.-W. Zang; Sh.-G. Zhu
      Pages: 596 - 604
      Abstract: This paper reports the experimental and theoretical studies of the synthesis and behavior of a cocrystal energetic material 2,4,6-trinitrotoluene/1,3,5-trinitrobenzene (TNT/TNB). The performance tests show that this material is more powerful and less sensitive than TNT and TNB. A molecular dynamic simulation is conducted for the cocrystal TNT/TNB by using a COMPASS force field with an NPT ensemble. The density function theory is applied to investigate the band structure and the density of states for various pressures and temperatures. The results show that the TNT/TNB crystal is sensitive to pressures in the interval of 35–50 GPa, and the melting temperature of the crystal is around ≈320 K, which agrees well with experimental results. The Hirshfeld analysis is carried out to ascertain weak interactions and associated two-dimensional fingerprint plots. The crystal packing is demonstrated to be ensured by H· · · O, C· · · O, and O· · ·O contacts.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050148
      Issue No: Vol. 53, No. 5 (2017)
       
  • Simulation of spall fracture of uranium at different temperatures in the
           region of polymorphic phase transitions
    • Authors: M. A. Desyatnikova; O. N. Ignatova; V. A. Raevskii
      Pages: 605 - 610
      Abstract: This paper presents the results of numerical simulation of Zaretskii’s experiments on loading of natural uranium in the phase-transition region at temperatures of 27–862°C. Simulation of these experiments is of interest because of the observed features of spall fracture of uranium in the phase-transition region. Spall fracture and compaction was simulated using the DGC-L model of the dynamics of growth and compaction in a liquid medium, which takes into account the effect of strength properties, pressure, surface tension, viscosity, and inertial forces on the growth and collapse of pores. Calculations were carried out according to the UP program— a Lagrangian method for calculating deformation problems of continuum mechanics in a onedimensional approximation.
      PubDate: 2017-09-01
      DOI: 10.1134/s001050821705015x
      Issue No: Vol. 53, No. 5 (2017)
       
  • Dielectric relaxation in energy condensed systems on the basis of
           polyefirretane elastomer. I. Frequency dependence
    • Authors: D. N. Sadovnichii; Yu. M. Milekhin; S. A. Malinin; I. D. Voropaev; E. V. Bogdanova
      Pages: 611 - 618
      Abstract: This paper describes the experimental study of dielectric relaxation in energy condensed systems based on ether urethane rubber plasticized by glycerin trinitrate and ammonium perchlorate, HMX, and aluminum powders in the frequency range of the electric field from 40 to 1.2 · 109 Hz. Depending on the field frequency, it was possible to determine relaxation processes caused by dipole polarization, the bulk electrical conductivity of a polymer binder, and the influence of the surface of aluminum particles.
      PubDate: 2017-09-01
      DOI: 10.1134/s0010508217050161
      Issue No: Vol. 53, No. 5 (2017)
       
  • Numerical and experimental study of ignition of a two-phase fuel
           composition (ethanol + air) in a resonance gas-dynamic system
    • Authors: K. Yu. Aref’ev; A. V. Voronetskii; M. A. Il’chenko; S. A. Suchkov
      Pages: 398 - 405
      Abstract: A mathematical model, laboratory setup description, and results of a numericalexperimental study of specific features of an unsteady two-phase flow of the ethanol–air mixture in the duct of a resonance gas-dynamic system (RGS) are presented. The basic specific features of ignition of the fuel mixture in the resonance cavity are detected. The conditions of ignition are determined, and the ignition delay time of the fuel composition in the RGS is estimated. The data obtained in this study can be used for modeling physical and chemical processes and for choosing liquid fuel injection modes satisfying the conditions of ignition of two-phase fuel mixtures in the RGS.
      PubDate: 2017-07-01
      DOI: 10.1134/s0010508217040037
      Issue No: Vol. 53, No. 4 (2017)
       
  • Mathematical modeling of propagation of explosion waves and their effect
           on various objects
    • Authors: S. A. Valger; N. N. Fedorova; A. V. Fedorov
      Pages: 433 - 443
      Abstract: Results of modeling the propagation of a shock wave formed by an explosion of a spherical charge of a high explosive in a semi-infinite space bounded by a flat substrate are reported. Problems of the action of such a wave on objects rigidly fixed on the substrate (a single prism and a set of prisms simulating an urban area) are considered. The computations are performed in a three-dimensional inviscid formulation with the use of the AUTODYN module of the ANSYS commercial software package. These numerical predictions are compared with experimental data on the static pressure measured by sensors mounted on the prism walls. It is demonstrated that an adequate description of the unsteady flow pattern formed around the obstacles mounted on the substrate can be provided. Based on these numerical data, the intensity of the shock wave action on various objects is estimated.
      PubDate: 2017-07-01
      DOI: 10.1134/s0010508217040074
      Issue No: Vol. 53, No. 4 (2017)
       
  • Detonation velocity of mechanically activated mixtures of ammonium
           perchlorate and aluminum
    • Authors: A. A. Shevchenko; A. Yu. Dolgoborodov; V. G. Kirilenko; M. A. Brazhnikov
      Pages: 461 - 470
      Abstract: The detonation properties of mechanically activated mixtures of ammonium perchlorate and aluminum were studied. The deflagration-to-detonation transition for low-density charges was investigated. Dependences of the detonation velocity of pressed charges with different types of aluminum on the activation time, density, and diameter of the charges were obtained. For compositions with nanosized aluminum, it is was found that the detonation velocity depends nonmonotonically on the inverse charge diameter and remains almost unchanged in a certain range of charge diameters. It is shown that the joint use of mechanical activation and nanosized components of the composite explosive significantly increases the detonability, reduces the critical diameter, and shifts the maximum of the detonation velocity as a function of density to higher charge densities.
      PubDate: 2017-07-01
      DOI: 10.1134/s0010508217040104
      Issue No: Vol. 53, No. 4 (2017)
       
  • Numerous experiment on impact compression of a mixture of graphite and
           water
    • Authors: L. V. Shurshalov; A. A. Charakhch’yan; K. V. Khishchenko
      Pages: 471 - 478
      Abstract: This paper describes the problem of the behavior of a mixture of small graphite particles with water in the conditions of shock-wave action at a pressure of 32 GPa and a temperature of up to 1200–1600 K. Graphite particles at these pressures and temperatures are capable of transforming into cubic diamonds or at least into their hexagonal form that is lonsdaleite. It is shown that, for sufficiently small graphite particles of the order of 1 μm, their mixture with water for about 10 μs can heat up to the above-mentioned temperatures and undergo phase transformation, remain in those conditions for about 50 μs, and then efficiently cool down during the next 50 μs to the temperatures below 300 K, while remaining in the diamond phase.
      PubDate: 2017-07-01
      DOI: 10.1134/s0010508217040116
      Issue No: Vol. 53, No. 4 (2017)
       
 
 
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