Two-dimensional effects of the head on interaction between planar shock wave with low density foam

Shock Waves ◽  
2005 ◽  
pp. 1049-1054
Author(s):  
G. Malamud ◽  
D. Levi-Hevroni ◽  
A. Levy
Keyword(s):  
Shock Wave ◽  
Low Density ◽  
Two Dimensional ◽  
Dimensional Effects ◽  
Planar Shock ◽  
Planar Shock Wave

Two-dimensional numerical study of planar shock-wave/moving-body interactions

Shock Waves ◽  
2003 ◽  
Vol 13 (5) ◽  
pp. 381-394 ◽  
Author(s):  
C. Law ◽  
L. T. Felthun ◽  
B. W. Skews
Keyword(s):  
Shock Wave ◽  
Numerical Study ◽  
Two Dimensional ◽  
Planar Shock ◽  
Moving Body ◽  
Planar Shock Wave

scholarly journals Interaction of two-dimensional spots with a heat releasing/absorbing shock wave: linear interaction approximation results

2019 ◽  
Vol 871 ◽  
pp. 865-895 ◽  
Author(s):  
G. Farag ◽  
P. Boivin ◽  
P. Sagaut
Keyword(s):  
Shock Wave ◽  
Compressible Flows ◽  
Two Dimensional ◽  
Extended Version ◽  
Unified Framework ◽  
Linear Interaction ◽  
Planar Shock ◽  
Planar Shock Wave ◽  
Gaussian Disturbance ◽  
Interaction Approximation

The canonical interaction between a two-dimensional weak Gaussian disturbance (entropy spot, density spot, weak vortex) with an exothermic/endothermic planar shock wave is studied via the linear interaction approximation. To this end, a unified framework based on an extended Kovásznay decomposition that simultaneously accounts for non-acoustic density disturbances along with a poloidal–toroidal splitting of the vorticity mode and for heat release is proposed. An extended version of Chu’s definition for the energy of disturbances in compressible flows encompassing multi-component mixtures of gases is also proposed. This new definition precludes spurious non-normal phenomena when computing the total energy of extended Kovásznay modes. Detailed results are provided for three cases, along with fully general expressions for mixed solutions that combine incoming vortical, entropy and density disturbances.

scholarly journals Planar shock wave sliding over a water layer

2016 ◽  
Vol 57 (8) ◽  
Author(s):  
V. Rodriguez ◽  
G. Jourdan ◽  
A. Marty ◽  
A. Allou ◽  
J.-D. Parisse
Keyword(s):  
Shock Wave ◽  
Water Layer ◽  
Planar Shock ◽  
Planar Shock Wave

Flow of a planar shock wave around a thermal layer at a rigid wall

1991 ◽  
Vol 31 (3) ◽  
pp. 354-361
Author(s):  
B. I. Zaslavskii ◽  
S. Yu. Morozkin ◽  
A. A. Prokof'ev ◽  
V. R. Shlegel'
Keyword(s):  
Shock Wave ◽  
Rigid Wall ◽  
Planar Shock ◽  
Planar Shock Wave ◽  
Thermal Layer

Specifics of generating explosively formed projectiles of variable shape from metal liners

2019 ◽  
Author(s):  
P.V. Kruglov ◽  
V.I. Kolpakov ◽  
I.A. Bolotina
Keyword(s):  
Shock Wave ◽  
Aspect Ratio ◽  
Detonation Wave ◽  
Variable Shape ◽  
Internal Surfaces ◽  
Planar Shock ◽  
Wave Generator ◽  
Planar Shock Wave ◽  
Metal Liner ◽  
A Charge

We propose using charges generating explosively formed projectiles of variable shape to remotely demolish structurally unsound concrete or brick walls of buildings and other structures. The paper considers the charges required, their design and operation. The operation of such a charge involves the explosive material accelerating a metal liner, covering a distance of up to several hundred charge diameters. The metal liner deforms while moving and assumes a compact shape. We used variable thickness copper liners, the external and internal surfaces of which are formed by a combination of spherical surfaces. A planar shock wave generator featuring a variable detonation wave slope is considered as the initiation system for the charge. We present the results of numerically simulating our explosive charge operation in order to determine how charge parameters affect performance. We estimated charge performance via two projectile parameters: its shape and velocity. The study also evaluated the effect of the planar shock wave generator slope on the projectile shape. We obtained projectile velocity and aspect ratio as functions of the slope of the converging detonation wave. We determined that decreasing the slope of the converging detonation wave front leads to an increase in the aspect ratio and velocity of the explosively formed projectile.

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