Bulletin of Research Center for Computing and Multimedia Studies, Hosei University
Online ISSN : 1882-7594
Numerical Analysis of Flow in Transonic Centrifugal Compressor
— Influence of Turbulence Model —
Masanao KanekoHoshio Tsujita
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RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS

2020 Volume 35 Pages 48-53

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Abstract

In order to accurately predict an aerodynamic performance of test turbomachinery by a CFD code, it is required to properly select a turbulence model by considering its internal flow field. In this study, the flows in a centrifugal compressor under transonic condition were analyzed numerically by alternatively using the Spalart-Allmaras and the SST k-ω turbulence models. The computed results clarified the following differences. Compared with the Spalart-Allmaras model, the SST k-ω model overestimates the double-leakage tip clearance flow, which increases the loss generation significantly, and consequently underestimates the efficiency.

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© 2020 Research Center for Computing and Multimedia Studies, Hosei University
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