A Numerical Study of the Three-Dimensional Turbulent Flow in the Impeller of a High-Speed Centrifugal Compressor
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Numerical analysis of the three-dimensional turbulent flow in an unshrouded impeller of a high-speed centrifugal compressor has been conducted using the multi-purpose CFD code STAR-CD. The work presented in this paper concentrates mainly on assessing the effects of the modelling of the actual spinner geometry on the quality of the predictions as compared to the often used practice of simplifying the inlet geometry. Furthermore, the contribution of detailed modelling of the flow in the tip clearance is studied using a two-layer k-ε turbulence model. As well as a qualitative analysis of the throughflow and tip leakage, a systematic quantitative comparison between the predicted and measured mean velocities and flow angles is presented.
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2014 ◽
Vol 663
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pp. 347-353
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