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  Subjects -> ENGINEERING (Total: 2279 journals)
    - CHEMICAL ENGINEERING (191 journals)
    - CIVIL ENGINEERING (185 journals)
    - ELECTRICAL ENGINEERING (101 journals)
    - ENGINEERING (1203 journals)
    - ENGINEERING MECHANICS AND MATERIALS (390 journals)
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ENGINEERING (1203 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: 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: 222)
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: 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: 10)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 20)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 24)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
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: 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: 29)
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: 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)
Arid Zone Journal of Engineering, Technology and Environment     Open Access  
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
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: 3)
Batteries     Open Access   (Followers: 4)
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: 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: 8)
Biomedical Science and Engineering     Open Access   (Followers: 3)
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  
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     Hybrid Journal   (Followers: 14)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 41)
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: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 4)
Coatings     Open Access   (Followers: 3)
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: 25)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 255)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 179)
Composites Part B : Engineering     Hybrid Journal   (Followers: 227)
Composites Science and Technology     Hybrid Journal   (Followers: 169)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 13)
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: 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: 29)
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: 25)
CT&F Ciencia, Tecnologia y Futuro     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  [2345 journals]
  • Rayleigh–Benard convection in a chemically active gas in the
           chemical equilibrium state
    • Authors: I. B. Palymskiy; V. I. Palymskiy; P. A. Fomin
      Pages: 123 - 133
      Abstract: The Rayleigh–Benard convection in a chemically active gas in the chemical equilibrium state is numerically studied in the Boussinesq approximation. A flat layer with isothermal horizontal boundaries free from shear stresses is considered. Thermodynamic parameters of the gas (hydrogen–oxygen mixture) are calculated by the previously proposed model of chemical equilibrium. It is shown that the allowance for recombination and dissociation processes leads to the emergence of an additional factor at the Rayleigh number. An expression for the growth rate of infinitesimal perturbations and a relation for the critical Rayleigh number as a function of temperature are derived. It is found that the neutral curves consist of the upper (instability due to heating from below) and lower (instability due to heating from above) branches. Results calculated for a nonlinear steady mode are reported.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020010
      Issue No: Vol. 53, No. 2 (2017)
       
  • Influence of natural convection on the heat explosion in porous media
    • Authors: K. Allali; Y. Joundy; A. Taik; V. Volpert
      Pages: 134 - 139
      Abstract: The interaction between natural convection and the heat explosion in porous media is studied. The model consists of a nonlinear heat equation coupled with the Darcy equation for the motion of an incompressible fluid in a porous medium. Numerical simulations are performed using the alternate direction finite difference method and the fast Fourier transform method. A complex behavior of solutions is observed, including periodic and aperiodic oscillations and an oscillating heat explosion. It is shown that convection can decrease the risk of the explosion due to additional mixing and heat loss, but it can also facilitate the explosion due to temperature oscillations arising as a result of instability of stationary convective regimes.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020022
      Issue No: Vol. 53, No. 2 (2017)
       
  • Investigation of soot nanoparticles during combustion of liquid
           hydrocarbons with injection of a superheated steam jet into the reaction
           zone
    • Authors: I. S. Anufriev; A. M. Baklanov; O. V. Borovkova; M. S. Vigriyanov; V. V. Leshchevich; O. V. Sharypov
      Pages: 140 - 148
      Abstract: The characteristics of soot particles formed during combustion of liquid hydrocarbons in a laboratory model of an original burner with injection of a superheated steam jet into the reaction zone are experimentally studied. The concentration and size distribution of soot particles formed in the burner flame are measured by a diffusion aerosol spectrometer. It is shown that the majority of the primary particles have sizes ranging from 20 to 60 nm. The particle concentration in the external flame rapidly decreases with distance from the burner exit from 108 to 5 · 106 cm−3. The images obtained by transmission electron microscopy demonstrate a chain-branched (fractallike) structure of aggregates. The primary particles composing these aggregates have a union-like structure with the interplane distance between the layers smaller than 1 nm. Compact aggregates with sizes up to 500 nm are observed in cooled combustion products. The content of soot in combustion products is 35 mg/m3, and the mean particle mass is 7 · 10−12 mg. Results obtained in the combustion modes with injection of a superheated steam jet and with injection of an air jet are compared.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020034
      Issue No: Vol. 53, No. 2 (2017)
       
  • Exhaustion of a silane jet into a space
    • Authors: A. V. Fedorov; Yu. V. Zakharova
      Pages: 149 - 156
      Abstract: Issues of explosion and fire safety of silane during its transportation and storage are intimately related to its possible catastrophic leak off from tanks if they become cracked. It turned out that silane self-ignition is possible at some leak off velocities. The interest of the aerospace industry to problems of ignition and combustion of silane combined with other fuels should be also noted. Experimental investigations of such problems, which are rather expensive and laborconsuming, provide primary information for the development and verification of mathematical models of physical and chemical processes, capable of predicting the characteristics of silane mixing, ignition, and combustion induced by its exhaustion. Recent experiments of Prof. Chen and his colleagues from Taiwan allowed them to determine the critical length of the silane jet (distance from the tube exit where ignition of exhausting silane occurred) and the time of silane ignition. In the present work, an attempt is made to simulate these phenomena within the framework of the concept of the critical concentration of silane with studying the dynamics of silane leak off from a tube.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020046
      Issue No: Vol. 53, No. 2 (2017)
       
  • Measurement of thermal electromotive force and determination of combustion
           parameters of a mixture of 5Ti + 3Si under quasi-isostatic compression
    • Authors: V. A. Shcherbakov; V. Yu. Barinov
      Pages: 157 - 164
      Abstract: This paper presents experimental dependences of the temperature, thermal electromotive force, velocity, and width of the combustion wave of a heterogeneous mixture of 5Ti + 3Si on the quasi-isostatic compression pressure. Combustion parameters are calculated from the results of measurements of the temperature gradient and the electrical potential difference in the combustion wave. It is shown that under quasi-isostatic compression conditions, the maximum burning rate is 90 mm/s and the width of the combustion wave is 10 mm. It is found that the voltage–temperature characteristic of combustion of a heterogeneous mixture of 5Ti + 3Si has a hysteresis shape. The cause of the hysteresis related to a change in the bulk concentration of electric charge carriers in the combustion wave is discussed.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020058
      Issue No: Vol. 53, No. 2 (2017)
       
  • Ignition of titanium during fracture in oxygen
    • Authors: B. I. Bolobov
      Pages: 165 - 170
      Abstract: This work demonstrates that the heating of fracture fragments of rods made of VT1-0 commercial titanium and its alloys OT4-1 and PT3V in gaseous oxygen at a pressure pO2, which is accepted in this paper and in the works of other researchers as critical pressure p*, only leads to melting of individual regions of the formed juvenile surface, which differ from each other only by obstructed heat sink, while the metal–oxygen interaction does not transfer into combustion. However, this interaction does transfer into combustion during which the bulk of the metal burns out at a slightly higher pressure p**, which can be calculated from the thermal explosion equation for temperature T* that is equal to the melting point of titanium, with account for the dissociative absorption of oxygen molecules on the melt surface and the heat exchange coefficient corresponding to the case where the heat is transferred from the melt hemisphere to the semibounded solid body.
      PubDate: 2017-03-01
      DOI: 10.1134/s001050821702006x
      Issue No: Vol. 53, No. 2 (2017)
       
  • Ignition and phase formation in the Zr–Al–C system
    • Authors: S. G. Vadchenko; D. Yu. Kovalev; M. A. Luginina
      Pages: 171 - 175
      Abstract: The ignition mechanism and the dependence of the composition of the products of combustion or thermal explosion in a mixture of 2Zr + Al + C on the initiation temperature and heat transfer conditions were studied. Heat transfer conditions were changed by varying the size of the samples and the gaseous medium in which the experiments were performed. Two contusion regimes were found: a low-temperature regime, in which zirconium aluminides formed and carbon and part of the zirconium remained unreacted, and a high-temperature regime in which the reaction products were zirconium carbide and aluminide. Upon re-initiation, the low-temperature combustion products reacted in the high-temperature combustion regime. The observed dependences are due to parallel reactions in the three-component system.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020071
      Issue No: Vol. 53, No. 2 (2017)
       
  • Numerical study of the effect of burnout on the ignition characteristics
           of polymer under local heating
    • Authors: D. O. Glushkov; G. V. Kuznetsov; P. A. Strizhak
      Pages: 176 - 186
      Abstract: This paper presents the results of a numerical study of the effect of burnout on the ignition delay of a typical thermoplastic polymer (polymethylmethacrylate) by a metal particle heated to a high temperature. The initial temperature of the energy source was varied from 960–1150 K. Three ignition modes of the polymer can be distinguished according to the temperature of the heat source, ignition delay, and the position of the ignition zone in the vicinity of the hot particle. It is found that under local heating conditions, the burnout of the heated region of the near-surface layer of the polymer has an insignificant effect (less than 5%) the increase in the basic characteristic of the process—the ignition delay. At the time of initiation of combustion, the degree of thermal decomposition of the polymer (degree of conversion) does not reach even 15% in the section corresponding to the maximum heat flux from the heat source. It is shown that the ignition delay increases more significantly when accounting for the temperature dependence of the thermal properties of polymethylmethacrylate than when accounting for the burnout factor. The induction period is increased by 15–25% due to an increase in the accumulating capacity of the polymer and heat transfer rate from the heated region of the near-surface layer into the depth of the material.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020083
      Issue No: Vol. 53, No. 2 (2017)
       
  • Scaling factor in continuous spin detonation of syngas–air mixtures
    • Authors: F. A. Bykovskii; S. A. Zhdan; E. F. Vedernikov; A. N. Samsonov
      Pages: 187 - 198
      Abstract: Multiwave regimes of continuous spin detonation in syngas–air mixtures in a flow-type annular cylindrical combustor 503 mm in diameter are obtained. Experiments are performed for mixtures of carbon oxide and hydrogen with the ratio of the components equal to 1/3, 1/2, or 1/1. The varied parameters are the flow rates of air and syngas, the ratio of these flow rates, and the combustor length. Scalability of the continuous spin detonation process is demonstrated: at identical values of the specific flow rate of air and the combustor expansion ratio, the number of transverse detonation waves increases with increasing combustor diameter. In the examined ranges of combustor lengths and specific flow rates of air, the frequency of these waves is independent of the combustor length, except for narrow regions where the number of waves (and, correspondingly, the flow regime) changes. The structures of transverse detonation waves in regular regimes are almost identical for all examined syngas compositions. It is shown that detonation can be initiated by a jet of combustion products. The minimum diameters of the detonation chamber for different flow rates of the mixture are estimated.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020095
      Issue No: Vol. 53, No. 2 (2017)
       
  • Structure of detonation waves in PETN
    • Authors: A. V. Utkin; V. M. Mochalova; A. I. Rogacheva; V. V. Yakushev
      Pages: 199 - 204
      Abstract: A VISAR technique was used to study the structure of the reaction zone in PETN for various initial densities and dispersion of samples. The flow in the pressed charges corresponds to the classical denotation model. In the case of bulk density, the peculiarities corresponding to an explosive combustion model are recorded. In the vicinity of the initial density of 1.7 g/cm3, a kink is found on the curve showing detonation velocity versus density, and the shock-wave initiation of PETN above and below the kink point is studied.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020101
      Issue No: Vol. 53, No. 2 (2017)
       
  • Influence of artificial pores on the detonation parameters of an emulsion
           explosive
    • Authors: A. S. Yunoshev; V. V. Sil’vestrov; A. V. Plastinin; S. I. Rafeichik
      Pages: 205 - 210
      Abstract: This paper presents the results of a study of the influence of the characteristics of porous inclusions on the detonation parameters of emulsion explosives (EMX). Glass and polymeric microballoons, perlite grains, hollow cenospheres, and a gas-generating additive are used as sensitizers. It is shown that polymeric microballoons with an ultra-thin wall filled with isobutane are the most efficient sensitizer that allows the potential of EMX to be fully realized.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020113
      Issue No: Vol. 53, No. 2 (2017)
       
  • Simulation of the ignition of organic explosives by a laser pulse in the
           weak absorption region
    • Authors: V. A. Dolgachev; E. V. Duginov; A. V. Khaneft
      Pages: 211 - 218
      Abstract: Numerical simulation of the ignition of RDX, HMX, and TATB by a nanosecond laser pulse was performed. The heat-conduction equation was solved in cylindrical coordinates with allowance for the multiple reflection of the light beam, a zero-order exothermic reaction, and melting. Despite the small temperature gradient due to the smallness of the radiation absorption coefficient, violation of thermal equilibrium due to Arrhenius nonlinearity leads to ignition of energetic materials from the surface. The critical energy density for ignition of PETN, RDX, HMX, and TATB by a nanosecond laser pulse was determined. Calculations have shown that with identical absorption and reflection coefficients, PETN is the most sensitive and TATB is the most heat-resistant.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020125
      Issue No: Vol. 53, No. 2 (2017)
       
  • Critical conditions of reaction initiation in the PETN during laser
           heating of light-absorbing nanoparticles
    • Authors: A. V. Kalenskii; N. V. Gazenaur; A. A. Zvekov; A. P. Nikitin
      Pages: 219 - 228
      Abstract: This paper describes the micro-hotspot model of laser initiation of energy materials. The relationship of the critical energy density and the temperature of the reaction hotspot in PETN with the nanoparticle radii of 12 metals at a pulse duration at half-height of 14 ns is determined. It is established that, as the nanoparticle radius is about 10 nm, the critical energy density tends to a certain value independent of heat capacity of metal. This is due to the reduction of the ratio of the nanoparticle volume to the volume of the heated PETN layer, which leads to the fact that most of the energy is spent on heating the matrix. It is shown that the critical hotspot temperature depends on both pulse duration and nanoparticle radius. The analytical expressions for the relationships of the critical parameters of reaction initiation with the radius and heat capacity of metal nanoparticles and for the relationship of the critical hotspot temperature with pulse duration are obtained. The invariant binding the critical energy density and the characteristic development time of the reaction is discovered. The results of this paper are necessary for the optimization of the composition of the optical detonator cell.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020137
      Issue No: Vol. 53, No. 2 (2017)
       
  • Laser initiation of low-density mixtures of PETN with metal additives
    • Authors: V. I. Tarzhanov; V. I. Sdobnov; A. D. Zinchenko; A. I. Pogrebov
      Pages: 229 - 235
      Abstract: This paper presents data on laser initiation of low-density mixtures of PETN with metal additives with varying dispersity of PETN and particle size of the additive. A laser with a wavelength of 1.06 μm and a pulse length of 40 and 30 ns was used. Curves of the threshold initiation parameters on the additive content are shown to have minima. For coarse additives, no significant dependence of the initiation threshold of the mixtures on the nature of the metal at its optimal content (except for aluminum) was observed. For PETN mixtures with an optimal amount of fine aluminum, a significantly greater (a factor of 6.2) decrease in the threshold initiation parameters compared to direct initiation of PETN was found. It is shown that the initiation thresholds of the mixtures do not depend on the dispersity of PETN with the optimal additive content. Increasing the dispersity of PETN extends the dependences of the threshold parameters on the additive content while the optimal additive content is shifted to higher values. The initiation thresholds are found to strongly depend on the density of the mixture charge. The key points of the mechanism of laser initiation of PETN mixtures with additives are formulated.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020149
      Issue No: Vol. 53, No. 2 (2017)
       
  • Effect of preliminary mechanical damage and porosity of explosive on the
           initiation conditions and explosion parameters in low-velocity impact
    • Authors: G. V. Belov; Yu. B. Bazarov; S. N. Vasenin; O. V. Kolmakov; E. N. Kostyukov; A. V. Kudashov; A. N. Tyurin; A. V. Shishkanov; N. I. Shustova
      Pages: 236 - 241
      Abstract: This paper presents the results of experimental studies of the effect of the damage and initial porosity of desensitized HMX samples on the limiting initiation conditions and explosion parameters under impact of steel spherical projectiles weighing 2–100 g. It is shown that preliminary mechanical damage to explosive samples and reducing their initial density lead to qualitatively the same result—an increase in the limiting impactor velocity initiating explosive transformation. Data are obtained on the damage structure of the samples in the absence of initiation and on the dependence of the physicomechanical properties of samples on their density.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020150
      Issue No: Vol. 53, No. 2 (2017)
       
  • Dispersion of metals under shock-wave loading by relativistic electron
           pulses and impactors accelerated by electric explosion
    • Authors: E. V. Kosheleva; V. V. Mokhova; A. M. Podurets; V. T. Punin; N. I. Sel’chenkova; A. V. Til’kunov; M. I. Tkachenko; I. R. Trunin; A. Ya. Uchaeva
      Pages: 242 - 248
      Abstract: Depending on the geometry and amplitude–time characteristics of external impact, there may be accumulation of shock-wave energy in the samples, which reduces the time during which the structural materials retain their functional properties. Dispersion from the free metal surface of samples without and with pre-applied perturbations in the form of pyramids is considered. Under certain amplitude–time characteristics of external impact, dispersion from the tips of the pyramids occurs. The quantitative characteristics of dynamic destructive processes at different amplitude–time characteristics of external impact are determined for the purpose of introducing them into two- and three-dimensional codes to predict the behavior of metals under extreme conditions.
      PubDate: 2017-03-01
      DOI: 10.1134/s0010508217020162
      Issue No: Vol. 53, No. 2 (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)
       
  • 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)
       
  • 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)
       
 
 
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