The present paper is concerned with the determination of the measuring position of a laser-Doppler anemometer (LDA) relative to a wall. The proposed method is based on the finding that the output of a hot-wire anemometer increases when the wire, which is mounted in quiescent air parallel to the wall
Micropositioning of a measuring volume in laser Doppler anemometry
β Scribed by C. Bertrand; P. Desevaux; J. P. Prenel
- Publisher
- Springer
- Year
- 1993
- Tongue
- English
- Weight
- 216 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0723-4864
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The problem of obtaining velocity information from laser Doppler anemometry (LDA) measurements is complicated by the presence of noise. Both electronic and optical noises are superimposed on the Doppler signal, acting as frequency modulators. In this paper an advanced spectral analysis method has be
A special-purpose high-resolution laser Doppler optical system has been used to investigate the wall region of a turbulent water flow within a rectangular channel. The exceptionally small control volume (30 I~m x 17 I~m x 15 pom) has enabled unique LDA measurements to be achieved on two walls of the