Velocity precision measurements using laser Doppler anemometry
Abstract
A Laser Doppler Anemometer (LDA) was calibrated to determine its applicability to high pressure measurements (up to 10 bars) for industrial purposes. The measurement procedure with LDA and the experimental computerized layouts are presented. The calibration procedure is based on absolute accuracy of Doppler frequency and calibration of interference strip intervals. A four-quadrant detector allows comparison of the interference strip distance measurements and computer profiles. Further development of LDA is recommended to increase accuracy (0.1% inaccuracy) and to apply the method industrially.
- Publication:
-
In its Problems of Large Gas Flow Measurements at High and Low Pressures p 52-81 (SEE N86-30962 22-34
- Pub Date:
- July 1985
- Bibcode:
- 1985plgf.nasa...52D
- Keywords:
-
- Calibrating;
- Feasibility Analysis;
- Gas Flow;
- Laser Doppler Velocimeters;
- Velocity Measurement;
- High Pressure;
- Optometry;
- Velocity Distribution;
- Instrumentation and Photography