Parameters Affecting Laser Velocimeter Turbulence Spectra Measurements
Abstract
The investigation developed a random sampling theory appropriate to utilizing the laser velocimeter optical technique for measurement of turbulence velocity spectra. The theory developed indicates that while undistorted turbulence spectra may be obtained from such a sampling technique, a wideband noise is superimposed on these spectra. The magnitude of this noise was related to the mean particle arrival rate. The required data acquisition rate was related to the spectral dynamic range and bandwidth of the flow phenomena. As part of the investigation, various other parameters were studied to define their effect on spectra measurements derived from the laser velocimeter technique. These include the studies of particle relaxation times and processor-borne errors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1974
- Accession Number
- AD0786886
Entities
People
- J. A. Asher
- J. C. Wang
- P. F. Scott
Organizations
- General Electric