POWER SPECTRA OF FLUID VELOCITIES MEASURED BY LASER DOPPLER VELOCIMETRY.

Ronald Adrian, C. S. Yao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

The power spectrum and the correlation of the laser Doppler velocimeter velocity signal obtained by sampling and holding the velocity at each new Doppler burst are studied. Theory valid for low fluctuation intensity flows shows that the measured spectrum is filtered at the mean sample rate and that it contains a filtered white noise spectrum caused by the steps in the sample and hold signal. In the limit of high data density, the step noise vanishes and the sample and hold signal is statistically unbiased for any turbulence intensity.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
EditorsAlexander Dybbs, Phillip A. Pfund
Place of PublicationNew York, NY, USA
PublisherASME
Pages197-208
Number of pages12
Volume33
StatePublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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    Adrian, R., & Yao, C. S. (1985). POWER SPECTRA OF FLUID VELOCITIES MEASURED BY LASER DOPPLER VELOCIMETRY. In A. Dybbs, & P. A. Pfund (Eds.), American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED (Vol. 33, pp. 197-208). ASME.