›› 2014, Vol. 23 ›› Issue (10): 104201-104201.doi: 10.1088/1674-1056/23/10/104201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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

高穹a, 易仕和b, 姜宗福a   

  1. a College of Photon-Electron Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    b College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2013-12-05 修回日期:2014-02-10 出版日期:2014-10-15 发布日期:2014-10-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61008037) and the National Basic Research Program of China (Grant No. 2009CB724100).

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

Gao Qiong (高穹)a, Yi Shi-He (易仕和)b, Jiang Zong-Fu (姜宗福)a   

  1. a College of Photon-Electron Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    b College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2013-12-05 Revised:2014-02-10 Online:2014-10-15 Published:2014-10-15
  • Contact: Gao Qiong E-mail:gaoqiong1980@126.com
  • About author:42.25.Dd; 47.40.Ki
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61008037) and 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 boundary 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

Abstract: Based on the measurement of one-dimensional (1D) optical path difference (OPD) of the supersonic turbulent boundary 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.

Key words: aero-optics, supersonic turbulent boundary layer, optical path difference, power spectrum

中图分类号:  (Wave propagation in random media)

  • 42.25.Dd
47.40.Ki (Supersonic and hypersonic flows)