Aero-optical Effects in Spatial Developing Compressible Mixing Layer

Wavefront aberration caused by spatial developing compressible mixing layer is simulated and wavefront fitting is used to analyze the characteristic of the aberration. The spatial scales of the wavefront aberration are analyzed by comparing the coefficients of Zernike polynomials and related to the scales of the structure in the mixing layer. The results show that wavefront fitting is valid to indicate the characteristic of wavefront distortion and the vortex structures affect wavefront aberration greatly.