NUMERICAL GAS-DYNAMIC SIMULATION OF STRONG EXPLOSIONS IN EXPONENTIAL ATMOSPHERE

V.A. Zhmaylo, V.V. Zmushko, F.A. Pletenev, I.D. Sofronov
VANT. Ser.: Mat. Mod. Fiz. Rroc 1990. Вып.3. С. 3-9.

      Numerical research on 2D problem of single explosion and 3D problem of two explosions at the same height in exponential atmosphere is described. The research was carried out within das-dynamic models with numerical approaches and within a modified method of infinitely thin shock layer. The computational results produced with different models both for 2D and 3D problems are compared.

      The computational results on the problem of two strong explosions of the same yield simultaneously in the exponential atmospheres at the same height at a certain distance from each other are described. 2D and 3D options of the problem (depending on the distance) are considered. The computations were carried out using RAMZES software package based on Eulerian-Lagrangian computational method for multidimensional non-stationary gas-dynamic problems. A distribution pattern of gas-dynamic parameters in the area covered with a shock wave was produced, as well as its development with time. There was noted the preservation of the 3D character of the perturbed area shape in the respective computations at all the time range of the computation starting with the collision moment of the shock waves spread from the blasts.