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Numerical Study of Acoustic Wave Passing through the Temporal Mixing Layer

By solving time-dependent Navier-Stokes equations, the high-order accuracy flow field was obtained by direct numerical simulation of temporal mixing layer, and the sound generation mechanism was studied. The distortion characteristics of two-dimensional Gaussian pulse propagating through temporal mixing layer was preliminarily studied. We found that the various degrees interaction between acoustic wave and the vortex structure in the mixing layer results in the distortion of acoustic wave.