Investigation of interaction between reflected shocks and growing perturbation on an interface

This paper reports the result of investigation into Richtmyer-Meshkov insta bility (RMI) resulting from multiple interactions of shock waves with the i nterface between two media of different densities. The instability growth r ates were measured after the interactions of the mixing zone with the refra cted shock and the first and the second shocks reflected front the endwall. It was shown that for the contribution of separate shock-interface interac tions to the instability growth rate; the condition of additivity is not re alized. The values of the factor psi, accounting for the decrease in the RM I growth rate due to the thickening of the mixing zone, have been determine d for a continous interface and for a turbulent, mixing zone.