基于波面拟合的可压缩剪切层气动光学效应分析  

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

作　　者：史可天[1] 马汉东[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《空气动力学学报》2013年第6期758-762,共5页Acta Aerodynamica Sinica

基　　金：科技部"973"计划项目(2009CB724105)

摘　　要：应用波面拟合技术建立了气动流场波面畸变特性分析方法,对可压缩剪切层流动引起的气动光学效应进行了分析。通过比较Zernike多项式展开系数的幅值分布,讨论了剪切层流动发展不同阶段的波面畸变空间尺度特性,与流场结构的空间尺度分布进行了对比分析。研究结果表明,应用波面拟合方法可以定量地描述波面畸变的空间尺度特性,流场结构的空间尺度及其分布是影响可压缩剪切层流场波面畸变的重要因素。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.

关 键 词：气动光学效应 波面拟合 ZERNIKE多项式 像差 

分 类 号：O434.19[机械工程—光学工程]