Intrablade velocity measurements in a transonic fan utilizing a laser Doppler velocimeter
Abstract
A two-color, two-component confocal backscatter laser Doppler velocimeter and its use in measuring the flow field between blades of an experimental transonic compressor blade row are described. A small velocity defect resulting from the presence of the smoke probe was revealed by comparison of upstream results with pressure probe data. Simultaneous measurements of two intrablade velocity components at 79% span were obtained over approximately 80% of one intrablade passage. The measurements clearly delineated the presence and orientation of the intrablade bow shock. An algorithm for estimating the median particle size observed and to refine the estimation of the shock location is given.
- Publication:
-
Laser Anemometry
- Pub Date:
- 1976
- Bibcode:
- 1976laan.symp..124W
- Keywords:
-
- Compressor Blades;
- Flow Distribution;
- Laser Doppler Velocimeters;
- Transonic Flow;
- Turbofans;
- Velocity Measurement;
- Algorithms;
- Backscattering;
- Bow Waves;
- Flow Measurement;
- Light Scattering;
- Particle Size Distribution;
- Shock Waves;
- Upstream;
- Instrumentation and Photography