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An experimental verification of laser-velocimeter sampling bias and its correctionThe existence of 'sampling bias' in individual-realization laser velocimeter measurements is experimentally verified and shown to be independent of sample rate. The experiments were performed in a simple two-stream mixing shear flow with the standard for comparison being laser-velocimeter results obtained under continuous-wave conditions. It is also demonstrated that the errors resulting from sampling bias can be removed by a proper interpretation of the sampling statistics. In addition, data obtained in a shock-induced separated flow and in the near-wake of airfoils are presented, both bias-corrected and uncorrected, to illustrate the effects of sampling bias in the extreme.
Document ID
19830047622
Document Type
Conference Paper
Authors
Johnson, D. A. (NASA Ames Research Center Moffett Field, CA, United States)
Modarress, D. (California State University Long Beach, CA, United States)
Owen, F. K. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Meeting Information
Engineering applications of laser velocimetry; Symposium(Phoenix, AZ)
Distribution Limits
Public
Copyright
Other