摘要: In this paper we consider changes in the refractive index at the high-speed flow over the wedge, using a combination of the high-fidelity Direct Molecular Simulation, the semi-classical model of the polarizability and interferomet... 展开 In this paper we consider changes in the refractive index at the high-speed flow over the wedge, using a combination of the high-fidelity Direct Molecular Simulation, the semi-classical model of the polarizability and interferometry measurements. The behavior of the Gladstone-Dale constant of air at various Mach numbers and vibrational non-equilibrium has been discussed. Simulation results were compared with the literature data and showed a good agreement on the Gladstone-Dale dependence on the level of dissociation of oxygen. The interferometry measurements have been conducted in the Hyper expansion Tunnel for the mixture of 20% O_2 and 80% Ar . The experimental results agree well with the simulation data in the refractive index decay inside the post-shock region. This fact confirms accuracy of the chemical reactions rates, and corresponding changes in the refractive index. Future experiments are planned to capture the refractive index jump across the Shockwave with more accuracy. 收起