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Turbulent transport measurements with a laser Doppler velocimeter.The power spectrum of phototube current from a laser Doppler velocimeter operating in the heterodyne mode has been computed. The spectral width and shape predicted by the theory are in agreement with experiment. For normal operating parameters the time-average spectrum contains information only for times shorter than the Lagrangian-integral time scale of the turbulence. To examine the long-time behavior, one must use either extremely small scattering angles, much-longer-wavelength radiation, or a different mode of signal analysis, e.g., FM detection.
Document ID
19730035660
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Edwards, R. V.
Angus, J. C.
(Case-Western-Reserve University Cleveland, Ohio, United States)
Dunning, J. W., Jr.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1972
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Pacific Chemical Engineering Meeting
Location: Kyoto
Country: Japan
Start Date: October 10, 1972
End Date: October 14, 1972
Sponsors: Japanese Society of Chemical Engineers
Accession Number
73A20462
Distribution Limits
Public
Copyright
Other

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