Abstract
Vorticity variation in a supersonic planar mixing layer interacting with an oblique shock wave is investigated analytically and numerically. A model that simplifies the mixing layer to a discontinuous flow is established to solve the post-shock flow parameters, and it is validated through qualitative and quantitative comparisons with the Buttsworth’s model and numerical results. A model to estimate the shock-induced Maximum Vorticity Amplification (MVA) is obtained, which agrees well with the numerical results. The model could estimate the growth rate and maximum vorticity of the shocked mixing layer. The vorticity of the mixing layer is amplified by the shock impingement, even though the vorticity thickness decreases, which can improve the mixing performance for different practical applications.
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