Biasing correction for individual realization of laser anemometer measurements in turbulent flows
作者:
D. K. McLaughlin,
W. G. Tiederman,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1973)
卷期:
Volume 16,
issue 12
页码: 2082-2088
ISSN:0031-9171
年代: 1973
DOI:10.1063/1.1694269
出版商: AIP
数据来源: AIP
摘要:
In turbulent flow situations the histograms constructed in the individual realization mode of laser anemometry are biased. The biasing occurs because a larger than average volume of fluid, and hence a larger than average number of scattering centers, pass through the probe volume during periods when the velocity is faster than the mean. Similarly, a smaller volume of fluid and a smaller number of scattering particles pass through the probe volume during periods when the velocity is slower than the mean. The proper weighting function needed to correct the biased data is the inverse of the instantaneous velocity vector. However, an analysis using turbulent flow models show that corrections based only upon the streamwise component of the velocity vector are adequate for many flow situations.
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