COMPUTATIONAL AND THEORETICAL STUDY OF A SHOCK WAVE INTERACTING WITH A ZONE OF TURBULENT MIXING OCCURRING ON AN AIR-ARGON FLAT BOUNDARY IN EXPERIMENTS WITH A SHOCK TUBE

摘要

This paper describes the formulation and calculation results obtained using the Euler gas aerodynamic code (EGAC) of interaction between a shock wave and a turbulent mixing zone, which develops on a flat interface separating air and argon. The study is carried out using both direct numerical three-dimensional modeling and a two-dimensional (k-epsilon) turbulence model. A comparison is made with the results of experiments in which the expansion and stratification of a shock wave is observed during its propagation after passing through a turbulent mixing zone. Calculations are carried out using the (k-epsilon) model and with account for the presence of a boundary layer, which make it possible to explain this effect.