Temporal evolution of optical path difference of a supersonic turbulent boundary layer

doi:10.1088/1674-1056/22/1/014202

Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (1): 14202-014202.doi: 10.1088/1674-1056/22/1/014202

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

Temporal evolution of optical path difference of a supersonic turbulent boundary layer

高穹^a, 易仕和^b, 姜宗福^a, 何霖^b, 谢文科^a

a College of Photon-electron Science and Engineering, National University of Defense Technology, Changsha 410073, China;
b College of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073, China

收稿日期:2012-06-13 修回日期:2012-09-04 出版日期:2012-12-01 发布日期:2012-12-01
基金资助:
Project supported by the Innovation Research Foundations for Postgraduates of National University of Defense Technology and Hunan Province, China and the National Natural Science Foundation of China (Grant No. 61008037).

Temporal evolution of optical path difference of a supersonic turbulent boundary layer

Gao Qiong (高穹)^a, Yi Shi-He (易仕和)^b, Jiang Zong-Fu (姜宗福)^a, He Lin (何霖)^b, Xie Wen-Ke (谢文科)^a

a College of Photon-electron Science and Engineering, National University of Defense Technology, Changsha 410073, China;
b College of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073, China

Received:2012-06-13 Revised:2012-09-04 Online:2012-12-01 Published:2012-12-01
Contact: Gao Qiong E-mail:gaoqiong1980@126.com
Supported by:
Project supported by the Innovation Research Foundations for Postgraduates of National University of Defense Technology and Hunan Province, China and the National Natural Science Foundation of China (Grant No. 61008037).

摘要/Abstract

摘要： The density distribution of a supersonic turbulent boundary layer is measured with the nanoparticle-based planar laser scattering technique, and the temporal evolution of its optical path difference (OPD) in a short time interval is characterized by proper orthogonal decomposition (POD). Based on the advantage of POD in capturing the energy of a signal, a temporal evolution model is suggested for the POD coefficients of OPD. In this model, the first few coefficients vary linearly with time, and the others are modeled by Gaussian statistics. As an application, this method is used to compute the short-exposure optical transfer function.

关键词: aero-optics, supersonic turbulent boundary layer, optical transfer function

Abstract: The density distribution of a supersonic turbulent boundary layer is measured with the nanoparticle-based planar laser scattering technique, and the temporal evolution of its optical path difference (OPD) in a short time interval is characterized by proper orthogonal decomposition (POD). Based on the advantage of POD in capturing the energy of a signal, a temporal evolution model is suggested for the POD coefficients of OPD. In this model, the first few coefficients vary linearly with time, and the others are modeled by Gaussian statistics. As an application, this method is used to compute the short-exposure optical transfer function.

Key words: aero-optics, supersonic turbulent boundary layer, optical transfer function

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

42.25.Dd

47.40.Ki (Supersonic and hypersonic flows)

高穹, 易仕和, 姜宗福, 何霖, 谢文科. Temporal evolution of optical path difference of a supersonic turbulent boundary layer[J]. Chin. Phys. B, 2013, 22(1): 14202-014202.

Gao Qiong (高穹), Yi Shi-He (易仕和), Jiang Zong-Fu (姜宗福), He Lin (何霖), Xie Wen-Ke (谢文科). Temporal evolution of optical path difference of a supersonic turbulent boundary layer[J]. Chin. Phys. B, 2013, 22(1): 14202-014202.

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Temporal evolution of optical path difference of a supersonic turbulent boundary layer

Temporal evolution of optical path difference of a supersonic turbulent boundary layer

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