Laser Doppler Velocimetry in a Low Speed Multistage Compressor
Abstract
Two-dimensional Laser Doppler Velocimetry (LDV) measurements were taken in the Low Speed Multistage Compressor (LSMSC) with data indexed to the rotor position. Laser measurements were conducted at two axial positions downstream of the second rotor and one axial position downstream of the second stator. The entire rotor periphery was measured at fixed radial displacements at each location and ensemble averaged. The survey downstream of the stator attempted to quantify the unsteady flow of the stator passage. Attempts were made to quantify the absolute flow angle behind both the rotor and the stator and compare them to pneumatic data collected at the same axial and circumferential positions respectively. Absolute flow angles calculated from the laser measurements were in agreement with pneumatic probe data. In addition, the surveys were conducted in an attempt to quantify the velocity profile from the rotor passage. The laser surveys indicated distinct and repeatable patterns in both the axial and circumferential components of the rotor exit velocity. Data downstream of the stator proved inconclusive.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1993
- Accession Number
- ADA274836
Entities
People
- Joseph M. Utschig
Organizations
- Naval Postgraduate School