Development of perturbations at a detonation front

1983 ◽  
Vol 19 (4) ◽  
pp. 478-480
Author(s):  
V. N. Mineev ◽  
A. A. Viktorov ◽  
V. E. Klapovskii ◽  
A. P. Volkov ◽  
T. I. Zheltova ◽  
...  
Keyword(s):  
Detonation Front

Two-dimensional cellular structure of a kinetically unstable detonation front

2008 ◽  
Vol 44 (4) ◽  
pp. 444-450 ◽  
Author(s):  
A. N. Dremin
Keyword(s):  
Cellular Structure ◽  
Detonation Front ◽  
Two Dimensional

Detonation front in homogeneous and heterogeneous high explosives

2000 ◽  
Author(s):  
A. V. Fedorov
Keyword(s):  
Detonation Front ◽  
High Explosives

scholarly journals Melting Point of Carbon Particles behind the Gas Detonation Front

2022 ◽  
Vol 16 (2) ◽  
pp. 59-70
Author(s):  
E. S. Prokhorov
Keyword(s):  
Melting Point ◽  
Detonation Front ◽  
Molar Fraction ◽  
Experimental Studies ◽  
Oxygen Mixture ◽  
Detonation Products ◽  
Gas Detonation ◽  
Nanoscale Particles ◽  
Carbon Particles ◽  
Carbon Condensate

A mathematical model of gas detonation of fuel-enriched mixtures of hydrocarbons with oxygen has been formulated, which makes it possible to numerically study the equilibrium flows of detonation products in the presence of free carbon condensation. Reference data for graphite were used to describe the thermodynamic properties of carbon condensate. The calculations are compared with the known results of experimental studies in which, when detonating an acetylene-oxygen mixture in a pipe closed at one end, it is possible to obtain nanoscale particles from a carbon material with special properties. It is assumed that the melting point of such a material is lower than that of graphite and is about 3100 K. Only with such an adjustment of the melting temperature, the best agreement (with an accuracy of about 3 %) was obtained between the calculated and experimental dependence of the detonation front velocity on the molar fraction of acetylene in the mixture.

COMPARISON OF CURVATURE OF DETONATION FRONT IN AP WITH THAT FOUND IN SOME CONVENTIONAL EXPLOSIVES

1970 ◽  
Author(s):  
John O. Erkman ◽  
Donna Price
Keyword(s):  
Detonation Front

Messung des Chapman-Jouguet-Druckes mit Röntgen-Absorption

1981 ◽  
Vol 36 (5) ◽  
pp. 437-442
Author(s):  
K. Hollenberg ◽  
H.-R. Kleinhanß ◽  
G. Reiling
Keyword(s):  
Free Surface ◽  
Pressure Range ◽  
Detonation Front ◽  
Surface Velocity ◽  
Free Surface Velocity ◽  
High Explosives ◽  
X Ray ◽  
X Ray Absorption

Abstract The Chapman Jouguet pressure of some high explosives is measured by X-ray absorption giving the density behind the detonation front. An accuracy of 2 - 3% was achieved in the pressure range of 200 kbar. The pressures are considerably lower than comparable results of other authors obtained by the free surface velocity method or similar techniques.

Dual detonation régimes in hydrogen/oxygen and deuterium/oxygen mixtures

1968 ◽  
Vol 306 (1485) ◽  
pp. 159-170 ◽  
Keyword(s):  
Constant Velocity ◽  
Composition Range ◽  
Detonation Front ◽  
Normal Velocity ◽  
Detonation Limits ◽  
Velocity Of Detonation ◽  
Hydrogen Deuterium ◽  
Subsequent Decomposition ◽  
Detailed Function ◽  
Alternative Regime

Velocity data have been determined as a detailed function of composition for the systems: S H = 2H 2 + O 2 diluted with H 2 , O 2 or CO 2 and S D = 2D 2 + O 2 diluted with D 2 or O 2 . Detonation limits have been established. Each mixture received standard initiation from a detonation in {2H 2 + O 2 }. Velocities were determined 8 ft. downstream from the initiating impact. Within this distance, either a constant velocity of detonation front was reached, or the mixture under test had failed to propagate detonation. Near the limit concentrations, under certain conditions an alternative constant velocity régime established itself. These detonation velocities were still greater than the velocity of sound in the unreacted mixture but about 30% below those of the ‘normal' régime, which alone extends throughout the entire composition range between the limits. Evidence is discussed that this alternative régime is associated with a different reaction mechanism in the detonation front, with hydrogen (deuterium) peroxide as end-product. Subsequent decomposition of this hydrogen peroxide apparently leads to the formation of a second detonation wave. This follows the first with a higher velocity and eventually overtakes it, thereby setting up the normal velocity régime, for which water is the end-product. Possible factors leading to such dual detonation régimes are discussed.

Structure of the nonideal detonation front in solid explosives

1971 ◽  
Vol 7 (3) ◽  
pp. 368-369 ◽  
Author(s):  
V. S. Trofimov ◽  
A. N. Dremin
Keyword(s):  
Detonation Front ◽  
Nonideal Detonation ◽  
Solid Explosives

Numerical Study of Detonation Propagation in an Insensitive High Explosive Arc with Confinement Materials

2020 ◽  
pp. 2050117
Author(s):  
Yupei Qin ◽  
Kuibang Huang ◽  
Huan Zheng ◽  
Yousheng Zhang ◽  
Xin Yu
Keyword(s):  
Stainless Steel ◽  
Steady State ◽  
Detonation Wave ◽  
High Explosive ◽  
Numerical Study ◽  
Detonation Front ◽  
Outer Boundary ◽  
Outer Part ◽  
Transition Phase ◽  
Detonation Propagation

Detonation propagation in a confined circular arc configuration of an insensitive high explosive PBX9502 is investigated via numerical simulation in this paper. We introduce a steady detonation wave entering the explosive arc with confinements of stainless steel, and then it undergoes a transition phase and reaches a new steady state with a constant angular speed eventually. The influences of the inner and the outer confinements on the propagating detonation wave as well as the characteristics of the detonation driving zone (DDZ) in the steady state are discussed, respectively. Ignition and Growth (I&G) reaction rate and Jones–Wilkins–Lee (JWL) equations of state for the reactants and the products of PBX9502 are employed in the numerical simulations on the basis of a two-dimensional Eulerian code. The equation of state for stainless steel is in the Grüneisen form with a linear shock speed–particle speed Hugoniot relationship. Our results show that the inner confinement dominates the evolution of the detonation wave and the outer confinement only takes effect in a local region near the outer boundary within a limited initial stage during the transition phase. As for the steady state, the existence of the inner confinement makes the DDZ possess a certain width on the inner boundary. While as to the outer part of the detonation wave, the width of the DDZ decreases until the sonic locus intersects with the detonation front shock, which results in the detachment of the DDZ from the outer boundary and makes the detonation propagation fully independent of the outer confinement.

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