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
O. G. Sin'kova, V. P. Statsenko, Yu. V. Yanilkin
All-Russian Scientific Research Institute of Experimental Physics (VNIIEF), Sarov, Russia
Keywords: shock wave, Rayleigh - Taylor instability, contact boundary, three-dimensional modeling, turbulent mixing, (k-e) model
Abstract
This paper describes the formulation and calculation results pertaining to the Euler gas aerodynamic complex (EGAC) method of interaction between a shock wave and a turbulent mixing zone, which develops on a flat contact boundary separating air and argon. The study is carried out using both direct numerical three-dimensional modeling and a two-dimensional ( k -e) 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 -e) model and with account for the presence of a boundary layer, which make it possible to explain this effect.
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