Reduction of flow-measurement uncertainties in laser velocimeters with nonorthogonal channelsAn analysis of certain geometrical limitations inherent in the application of laser velocimeters with nonorthogonal channels has led to the development of advanced-LDA-calibration and data-acquisition techniques that minimize systematic and statistical errors, respectively. The data-acquisition technique optimizes the number of velocity samples collected from three velocimeter channels as a function of local turbulence intensity, vector direction, and prescribed confidence interval. Linear velocity surveys and streamline traces measured in a turbulent flow field with a three-dimensional laser velocimeter are presented and the validity and accuracy of the theoretical analysis are discussed.
Document ID
19830035268
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Snyder, P. K. (NASA Ames Research Center Moffett Field, CA, United States)
Orloff, K. L. (NASA Ames Research Center Moffett Field, CA, United States)
Reinath, M. S. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Instrumentation And Photography
Report/Patent Number
AIAA PAPER 83-0051
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting