Spectral analysis of signals from a laser Doppler anemometer operating in the burst mode
- 1 September 1980
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 13 (9) , 977-981
- https://doi.org/10.1088/0022-3735/13/9/019
Abstract
Recently developed methods of spectral analysis for randomly sampled signals are applied to data acquired by a laser Doppler anemometer (LDA) operating in the burst mode, where the velocity of individual particles is computed. The measurements, which were obtained in a seeded air jet, support the adoption of a Poisson model for the distribution of the particle arrival times. Spectral estimates formed from the LDA data are found to agree well with corresponding estimates obtained from a hot wire probe, and have a variability which conforms with theoretical predictions. The advantages and limitations of a simple method of reducing the variability of the spectral estimates is discussed.Keywords
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