Last edited by Kegul
Monday, November 9, 2020 | History

2 edition of Heterogeneous detonation of condensed explosives with metallic particles found in the catalog.

Heterogeneous detonation of condensed explosives with metallic particles

Alexander L. Gonor

Heterogeneous detonation of condensed explosives with metallic particles

former Soviet Union R&D

by Alexander L. Gonor

  • 227 Want to read
  • 30 Currently reading

Published by Global Consultants in Alexandria, Va .
Written in English

    Subjects:
  • Explosions.,
  • Explosives.,
  • Detonation waves.

  • Edition Notes

    StatementAlexander L. Gonor.
    SeriesForeign technology assessment
    Classifications
    LC ClassificationsQD516 .G653 1994
    The Physical Object
    Paginationix, 278 p. :
    Number of Pages278
    ID Numbers
    Open LibraryOL18270208M
    ISBN 10188187415X

    Model of reduced kinetics for describing heterogeneous detonation in gas particle mixtures with non-uniform concentration distribution Detonation of a thin explosive layer in evacuated tubes. Combustion, Explosion, and Shock Waves, Vol. 34, No. 6 Modeling the propagation of a nonsteady turbulent flame in an aerosol of metallic particles. explosives metallic additives detonation ballistic capability blast waves Detonation in heterogeneous mixtures of liquids and particles, Shock Waves, 10, , [7] R. C. Ripley et al., Detonation interaction with metal particles in explosives, 13th International Detonation Symposium, Norfolk, VA, Estimation of Detonation Velocity of CHNO Explosives Equation of State for Detonation of Explosives Density and Detonation Velocity Energetic Explosive Materials Industrial Explosives ANFO Explosives Slurry and Emulsion Explosives Military Explosives Shock interaction with solid particles in condensed matter interaction is reasonable for detonation in two-phase mixtures of gas and solid par-ticles. However, for detonation in condensed matter such as in liquid explosive with aluminium particles of ,im, .


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Heterogeneous detonation of condensed explosives with metallic particles by Alexander L. Gonor Download PDF EPUB FB2

This paper describes the development of a comprehensive model of a steady detonation wave in a heterogeneous charge with metallic reactive particles, its various sub-models, analysis of the numerical results for different RDX/Al mixtures and comparison with experiment.

Heterogeneous explosives contain a mixture of standard explosive material and reactive metal particles. The inclusion of metal particles alters the energy density and energy release timescales involved in the blast event.

Available experimental evidence indicates that metal particles may be damaged or fragmented during heterogeneous blast, altering the distribution of particle sizes Cited by: 5. The particle momentum effects associated with this two-phase flow have been investigated experimentally and numerically for a heterogeneous explosive consisting of a packed bed of inert particles saturated with a liquid explosive.

Experimentally, the dispersion of the particles was tracked using flash radiography and high-speed photography. A Cited by: The rapid dispersal of inert solid particles due to the detonation of a heterogeneous explosive, consisting of a packed bed of steel beads saturated with a liquid explosive, has been investigated.

The heterogeneous detonation of a condensed explosive/inert particle mixture was studied to improve understanding of the mechanical and thermal interaction between the explosive, detonation. 2,4,6-trinitrotoluene (TNT) is widely used in conventional and insensitive munitions as a fusible binder, commonly melt-cast with other explosives such as 1,3,5-trinitroperhydro-1,3,5-triazine (RDX.

A wealth of experimental data on the detonation performance of Alcontaining formulations based on the different types of HE have been acquired over the course of the past century [1–27].

In general. Academic Press, New York. Mader, C. () A study of the one-dimensional time-dependent reaction zone of nitromethane and liquid TNT. Los Alamos Scientific Laboratory Report LA Petrone, F. () Validity of the classical detonation wave structure for condensed explosives, Phys.

of Flu 1 Introduction. High values of electrical conductivity σ are obtained at the detonation of condensed high explosives (HEs) with the formula C a H b N c O d ranging from several Ohm −1 cm −1 to hundreds of Ohm −1 cm −1.

2–4 Several hypotheses were proposed to explain such high conductivity: 5–8 the ionization of intermediate detonation products (DP), the dissociation of DP, the. Describes in one volume the data received during experiments on detonation in high explosive charges This book brings together, in one volume, information normally covered in a series of journal articles on high explosive detonation tests, so that developers can create new explosive technologies.

It focuses on the charges that contain inert elements made of materials in which a sound velocity. Toward a Thermal Disequilibrium Multiphase Model for High Explosives Containing Metallic Particles.

Journal of Energetic Materials: Vol. 28, Proceedings from the Seventh International Conference on New Models and Hydrocodes for Shock Wave Processes in Condensed.

Shock interaction with solid particles in condensed matter interaction is reasonable for detonation in two-phase mixtures of gas and solid par- ticles. However, for detonation in condensed matter such as in liquid explosive with aluminium particles of —1 the shock interaction time is about the same order.

Abstract. The dispersion of detonation products of a condensed explosive charge is numerically investigated; the charge is spherical and contains chemically inert solid particles uniformly distributed throughout its volume.

American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA The addition of heterogeneities such as metal particles into condensed explosives introduces microscopic interaction of the detonation shock and reaction zone with the particles, which produces localized hot spots, transverse waves and high-pressure fluctuations that are manifested in macroscale detonation phenomena.

Detonation of Condensed Explosives. Authors: Cheret, Roger Free Preview. Buy this book eB89 € Whilst this book is a testament to the activity and success of staff of the CEA, it also reviews a number ofthe advances made in the discipline. How­ ever, it is not intended to be an exhaustive account of those advances; it is assumed.

We pursued a quantitative comparison of the continuum and mesoscale simulations of metal particle reactions in a condensed explosive. The continuum or homogeneous approximation assumed a single combustible mixture; contrastingly, in the present heterogeneous treatment of a mixture, aluminum and 1,3,5,7-tetranitro-1,3,5,7-tetrazocane were considered independent reactive.

High-energy, condensed-phase explosives are heterogeneous materials with a complex microstructure consisting of crystalline grains of the energetic material held together by an inert plastic binder.

In addition, the microstructure typically contains voids, gaseous pores, metallic particles. performance of Al-containing explosives. Advantages have been gained in understanding the mechanisms and regularities of the detonation in such materials.

On the basis of the results presented in a number of monographs and reviews [14,15,22,26], one can make some inferences on the Al effect. Incorpo- ration of Al into the formulations (up to 20%) results in an increase in the heat of. Nadia Abdul-Karim, Christopher S. Blackman, Philip P.

Gill and Kersti Karu, The spatial distribution patterns of condensed phase post-blast explosive residues formed during detonation, Journal of Hazardous Materials,(), (). addition of heterogeneities such as metal particles into condensed explosives introduces microscopic interaction of the detonation shock and reaction zone with the particles, which produces localized hot spots, transverse waves and high- pressure fluctuations that are manifested in macroscale detonation phenomena.

This book is the fourth of several volumes on solids in the Shock Wave Science and Technology Reference Library. These volumes are primarily concerned with high-pressure shock waves in solid media, including detonation and high-velocity impact and penetration events. to record the emissions from heterogeneous explosives consisting ofapacked bedofmetallic particles saturated metallic particles saturated with a liquid explosive have propertiesoftheexplosiveitself,suchasthecriticalcharge diameter, detonation velocity, detonation pressure, and detonationtemperature[1–7].Previousstudiesoftheblast.

detonation theory for explosive systems composed of reactive particles dis-persed in oxidizing gases and in reactive gases. The chapter further presents a review of profound experiments on the transition to heterogeneous detona-tion, heterogeneous detonation structure, quasi-detonation, and hybrid deto-nation.

Lieberthal, B. A., Bdzil, J. & Stewart, D. Modelling detonation of heterogeneous explosives with embedded inert particles using detonation shock dynamics: Normal and divergent propagation in regular and simplified microstructure.

Shock initiation and detonation extinction in homogeneous and heterogeneous explosives - Free download as PDF File .pdf), Text File .txt) or read online for free. Chemical explosives can be found in gaseous, liquid or solid phases but it is customary to distinguish homogeneous from heterogeneous.

br A. Milne, Detonation in heterogeneous mixtures of liquids and particles, Shock Waves, 10 () Google Scholar Cross Ref br R. Ripley, F. Zhang, F. Lien, Detonation interaction with metal particles in explosives, in: 13th International Detonation Symposium,   DETONATION AND COMBUSTION OF NEW HETEROGENEOUS COMPOSITE EXPLOSIVES CONTAINING ALUMINUM PARTICLES 1.

XIth INTERNATIONAL ARMAMENT CONFERENCE ON SCIENTIFIC ASPECTS OF ARMAMENT AND SAFETY TECHNOLOGY Detonation and combustion of new heterogeneous composite explosives containing aluminum particles Lotfi. products. A particular metallized explosive that has been studied in the past consists of a packed bed of metallic particles saturated with a liquid explosive.

This generic heterogeneous explosive is a convenient system for studying the effect of various physical parameters (e.g., particle size and solid mass fraction) and chemical.

Calculations indicate that pressures in the detonation wave may run as high asatmospheres and temperatures to degrees C. The shape of the detonation wave front in a high velocity explosive like blasting gelatin is apparently planar whereas in low velocity explosives it is convex.

@article{osti_, title = {Shock Initiation of Heterogeneous Explosives}, author = {Reaugh, J E}, abstractNote = {The fundamental picture that shock initiation in heterogeneous explosives is caused by the linking of hot spots formed at inhomogeneities was put forward by several researchers in the 's and 's, and more recently.

heterogeneous nature of solid explosives, the rates derived from this and similar models are only system is perhaps the simplest and best explained for common condensed explosives.

However, Forest, "Two-Dimensional Homogeneous and Heterogeneous Detonation Wave Propagation," Los Alarnos Scientific Laboratory Report LA ().

This is a very > simplified explanation of what I believe is the current theory of detonation. That explanation works only for heterogeneous or less reactive explosives (so called 'Forest fire' -model; after the inventor).

Homogeneous explosives detonate with a different mechanism, although hot spots will still aid the initiation process.

The simulation examines a spherical explosive design with a mixture of nitromethane as the high explosive and steel as the metal particles. The algorithm provides a computational model of the detonation and explosion by producing position, velocity, and temperature profiles for the metal particles over time.

The condensed products of detonation of benzotrifuroxane are mainly large round particles up to a few hundred nanometers in diameter (figure 4a).

According to TEM analysis, these particles have a heterogeneous internal structure (figure 4b). Detection of nanodiamonds in the. homogeneous liquid and heterogeneous explosives is due to different mechanisms supporting wave propagation. Homogeneous burn is the mechanism involved in the detonation of homogeneous explosives.~hile in the case of heterogeneous explosives it is re-inforced by "hot spots".

The. @article{osti_, title = {Diameter effect in high-density heterogeneous explosives}, author = {Campbell, A W and Engelke, R}, abstractNote = {A phenomenological study of the dependence of steady detonation velocity on charge radius (the ''diameter effect'') in cylindrical configuration is described.

Consideration is mainly given to high-density heterogeneous solid explosives cast or. (). Microstructure effects on the detonation velocity of a heterogeneous high-explosive.

Journal of Energetic Materials: Vol. 36, No. 4, pp. at the Detonation of Condensed Explosives Nataliya P. Satonkina (Dated: Septem ) The highly-sensitive method is proposed for the real-time diagnostics of the chemical peak (von Neumann peak) at detonation of brisant high explosives. The absence of the direct link between the pressure and the course of chemical reactions was shown.

Heterogeneous combustion of condensed particles in transition regime Deniz Yildiz New Jersey Institute of Technology Follow this and additional works at: Part of theChemical Engineering Commons This Thesis is brought to you for free and open access by the Theses and Dissertations at Digital Commons @ NJIT.

Nanosized metallic and explosive powders have been used as solid propellant and explosive mixtures to increase efficiency. At the same time recent studies reveal that the presence of nanosized metals in propellants does not necessary translate into an increased burning rate and burning temperature.

Model of heterogeneous combustion of small.Detonation process of a condensed explosive was simulated using a finite difference method. Euler equations were applied to describe the detonation flow field, an ignition and growth model for the chemical reaction and Jones-Wilkins-Lee (JWL) equations of state for the state of explosives and detonation products.diameter has been observed for explosive charges containing metallic particles: the critical charge diameter for which the particles ignite and react within the expanding detonation products (Critical Diameter for Particle Ignition or CDPI) [5].

Above the CDPI, the residence time of the particles in the hot detonation products is sufficient to.