Universal form of the power spectrum of the aero-optical aberration caused by the supersonic turbulent boundary layer  

作　　者：高穹 易仕和 姜宗福 

机构地区：[1]College of Photon–Electron Science and Engineering, National University of Defense Technology [2]College of Aerospace Science and Engineering, National University of Defense Technology

出　　处：《Chinese Physics B》2014年第10期118-123,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61008037);the National Basic Research Program of China(Grant No.2009CB724100)

摘　　要：Based on the measurement of one-dimensional （1D） optical path difference （OPD） of the supersonic turbulent bound- ary layer, an analytical form for the power spectrum of the two-dimensional （2D） OPD is obtained with its structure function and under the locally homogeneous isotropic assumption. The universality of this spectrum is argued, and its validity is checked by the comparison with experimental result. The potential applications of this model in theoretical and numerical studies are emphasized. Another contribution of this work is around the application of correlation function to analyzing the statistics of OPD. Based on our results and other results published elsewhere, we show that the OPD is often not stationary, and one should be cautious about using this tool.Based on the measurement of one-dimensional （1D） optical path difference （OPD） of the supersonic turbulent bound- ary layer, an analytical form for the power spectrum of the two-dimensional （2D） OPD is obtained with its structure function and under the locally homogeneous isotropic assumption. The universality of this spectrum is argued, and its validity is checked by the comparison with experimental result. The potential applications of this model in theoretical and numerical studies are emphasized. Another contribution of this work is around the application of correlation function to analyzing the statistics of OPD. Based on our results and other results published elsewhere, we show that the OPD is often not stationary, and one should be cautious about using this tool.

关 键 词：AERO-OPTICS supersonic turbulent boundary layer optical path difference power spectrum 

分 类 号：O426[理学—声学] O357.5[理学—物理]