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

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

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.

Keywords: aero-optics supersonic turbulent boundary layer optical transfer function

Received: 13 June 2012
Revised: 04 September 2012
Accepted manuscript online:

PACS:	42.25.Dd	(Wave propagation in random media)
	47.40.Ki	(Supersonic and hypersonic flows)

Fund: 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).

Corresponding Authors: Gao Qiong
E-mail: gaoqiong1980@126.com

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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 2013 Chin. Phys. B 22 014202

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

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