The three-dimensional viscous flow field of a 4.7:1 pressure ratio backswept impeller was studied experimentally and numerically by using laser velocimetry and an advanced three-dimensional viscous code. The impeller was designed by a CAD method, and a maximum rotor efficiency of 94 percent was achieved. Both the experimental and the theoretical approach revealed comparatively smooth impeller discharge velocity profiles at all three operating conditions (design, choke, and near surge) differing widely from the well-known jet/wake-type flow pattern. The three-dimensional viscous code was used for detailed flowfield studies, i.e., secondary flows; vortex motion and tip-clearance effects were analyzed at design and off-design conditions. The comparison of experimental and numerical results indicates that the tip-clearance effect should be properly modeled to predict the impeller flow pattern properly and that optimum shape of rotor exit flow pattern can be obtained by controlling the swirling vortex motion.
Skip Nav Destination
Close
Sign In or Register for Account
Article navigation
January 1990
Research Papers
Secondary Flows and Vortex Motion in a High-Efficiency Backswept Impeller at Design and Off-Design Conditions
C. Hah
GE Research and Development Center, Schenectady, NY
H. Krain
DFVLR-Institut fu¨r Antriebstechnik, Ko¨ln, Federal Republic of Germany
J. Turbomach. Jan 1990, 112(1): 7-13 (7 pages)
Published Online: January 1, 1990
Article history
Received:
January 27, 1989
Online:
June 9, 2008
Citation
Hah, C., and Krain, H. (January 1, 1990). "Secondary Flows and Vortex Motion in a High-Efficiency Backswept Impeller at Design and Off-Design Conditions." ASME. J. Turbomach. January 1990; 112(1): 7–13. https://doi.org/10.1115/1.2927425
Download citation file:
- Ris (Zotero)
- Reference Manager
- EasyBib
- Bookends
- Mendeley
- Papers
- EndNote
- RefWorks
- BibTex
- ProCite
- Medlars
Close
Sign In
Get Email Alerts
Cited By
Related Articles
Suppression of Mixed-Flow Pump Instability and Surge by the Active Alteration of Impeller Secondary Flows
J. Turbomach (October,1994)
An Enhanced Greitzer Compressor Model Including Pipeline Dynamics and Surge
J. Vib. Acoust (October,2011)
A Plexiglas Research Pump With Calibrated Magnetic Bearings/Load Cells for Radial and Axial Hydraulic Force Measurement
J. Fluids Eng (March,1999)
The Use of 3D Viscous Flow Calculations in the Design and Analysis of Industrial Centrifugal Compressors
J. Turbomach (January,1992)
Related Proceedings Papers
Related Chapters
Aerodynamic Performance Analysis
Axial-Flow Compressors
One-Dimensional Aerodynamic Performance Analysis
Centrifugal Compressors: A Strategy for Aerodynamic Design and Analysis
Dynamic Behavior of Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach