Flow field analysis of radial and backswept centrifugal compressor impellers. I - Flow measurements using a laser velocimeter
Abstract
The internal flow in 2 centrifugal impellers with radial and backswept discharge, but otherwise identical design, has been investigated at tip speeds of 300 m/s. A laser velocimeter was applied for a detailed flow analysis, in addition to conventional flow probing and instantaneous wall pressure recordings. While the inducer flow patterns develop similarly up to a 3D flow separation at the shroud, significant differences arise in the second half of the flow channels. Enhanced jet/wake mixing in the backward-curved region provides a less distorted exit flow. The impeller flow evaluation is completed by a comparative discussion of the secondary flow fields and the distinct loss and slip distributions.
- Publication:
-
Performance Prediction of Centrifugal Pumps and Compressors
- Pub Date:
- 1979
- Bibcode:
- 1979ppcp.proc...77E
- Keywords:
-
- Centrifugal Compressors;
- Flow Distribution;
- Impellers;
- Laser Doppler Velocimeters;
- Radial Flow;
- Sweepback;
- Compressor Efficiency;
- Flow Measurement;
- Gas Turbine Engines;
- Velocity Distribution;
- Wall Pressure;
- Instrumentation and Photography