ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Simultaneous density and velocity measurements in a supersonic turbulent boundary layer |
He Lin (何霖), Yi Shi-He (易仕和), Tian Li-Feng (田立丰), Chen Zhi (陈植), Zhu Yang-Zhu (朱杨柱) |
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract A novel technique for simultaneous measurements of instantaneous whole-field density and velocity fields of supersonic flows has been developed. The density measurement is performed based on the nano-tracer planar laser scattering (NPLS) technique, while the velocity measurement is carried out using particle image velocimetry (PIV). The present experimental technique has been applied to a flat-plate turbulent boundary layer at Mach 3, and the measurement accuracy of the density and velocity are discussed. Based on this new technique, the Reynolds stress distributions were also obtained, demonstrating that this is an effective means for measuring Reynolds stresses under compressible conditions.
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Received: 27 June 2012
Revised: 23 August 2012
Accepted manuscript online:
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PACS:
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47.40.Ki
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(Supersonic and hypersonic flows)
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47.27.nb
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(Boundary layer turbulence ?)
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47.80.Jk
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(Flow visualization and imaging)
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Fund: Project supported by the National Basic Research Program of China (Grant No. 2009CB724100) and the National Natural Science Foundation of China (Grant No. 11172326). |
Corresponding Authors:
Yi Shi-He
E-mail: ysh_1819@yahoo.com.cn
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Cite this article:
He Lin (何霖), Yi Shi-He (易仕和), Tian Li-Feng (田立丰), Chen Zhi (陈植), Zhu Yang-Zhu (朱杨柱) Simultaneous density and velocity measurements in a supersonic turbulent boundary layer 2013 Chin. Phys. B 22 024704
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