Numerical investigation of the influence of variable diffuser vane angles on the performance of a centrifugal compressor

Abstract In this study, the performance of a turbocharger compressor system for light-duty diesels, encompassing the airflow geometry from impeller inlet to volute exit, has been simulated numerically, and the effects of variable diffuser vane angles on the compressor performance and operating range...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part D, Journal of automobile engineering Journal of automobile engineering, 2009-08, Vol.223 (8), p.1061-1070
Main Authors: Jiao, K, Sun, H, Li, X, Wu, H, Krivitzky, E, Schram, T, Larosiliere, L M
Format: Article
Language:English
Subjects:
Air flow
Angles (geometry)
Applied sciences
Centrifugal compressors
Compressor efficiency
Compressors
Computer simulation
Design engineering
Design optimization
Diffusers
Engines and turbines
Exact sciences and technology
Fluid dynamics
Guide vanes
Internal combustion engines: gazoline engine, diesel engines, etc
Mechanical engineering
Mechanical engineering. Machine design
Numerical analysis
Product design
Pump and compressors (turbocompressors, fans, etc.)
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Summary:Abstract In this study, the performance of a turbocharger compressor system for light-duty diesels, encompassing the airflow geometry from impeller inlet to volute exit, has been simulated numerically, and the effects of variable diffuser vane angles on the compressor performance and operating range have been investigated. It is found that the angle of the diffuser vane has significant influence on the compressor operating range, and optimized design of the variable diffuser vane angle can increase the stable operating range and improve the compressor efficiency significantly when compared with fixed diffuser vane angles and vaneless designs. However, changing the diffuser vane angle alone may not achieve the full control of the operating range of a compressor desired. Other technologies (e.g. variable inlet guide vanes, casing treatment, or optimum impeller design) may also be necessary to achieve the widest operating range required.
ISSN:0954-4070
2041-2991
DOI:10.1243/09544070JAUTO1202