Analysis of aero-optical effects in compressible shear layers based on wavefront fitting

Wavefront fitting is used to analyze the characteristic of the wavefront distortion caused by the aerodynamic flow field, and aerooptical effects in compressible shear layers are discussed. The spatial scales of the wavefront distortion are analyzed by comparing the coefficients of Zernike polynomials, and they are related to the scales of the structure in the shear layer. The results show that wavefront fitting is valid to indicate the scale of the wavefront distortion quantitatively, and the scales and distribution of the vortex structure affect wavefront distortion greatly for the compressible shear layer.