POWER SPECTRA OF FLUID VELOCITIES MEASURED BY LASER DOPPLER VELOCIMETRY.

Ronald Adrian; C. S. Yao

POWER SPECTRA OF FLUID VELOCITIES MEASURED BY LASER DOPPLER VELOCIMETRY.

Ronald Adrian, C. S. Yao

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 language	English (US)
Title of host publication	American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Editors	Alexander Dybbs, Phillip A. Pfund
Place of Publication	New York, NY, USA
Publisher	ASME
Pages	197-208
Number of pages	12
Volume	33
State	Published - 1985
Externally published	Yes

ASJC Scopus subject areas

General Engineering

Cite this

POWER SPECTRA OF FLUID VELOCITIES MEASURED BY LASER DOPPLER VELOCIMETRY. / Adrian, Ronald; Yao, C. S.
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED. ed. / Alexander Dybbs; Phillip A. Pfund. Vol. 33 New York, NY, USA: ASME, 1985. p. 197-208.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - 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.

AB - 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.

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AN - SCOPUS:0022269341

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BT - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED

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ER -

POWER SPECTRA OF FLUID VELOCITIES MEASURED BY LASER DOPPLER VELOCIMETRY.

Abstract

ASJC Scopus subject areas

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