Volume 28 Issue 11
Nov.  2013
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LI Pei-yuan, GU Chun-wei. CFD result validation and analysis of a subsonic centrifugal compressor impeller with splitter blades[J]. Journal of Aerospace Power, 2013, 28(11): 2495-2502.
Citation: LI Pei-yuan, GU Chun-wei. CFD result validation and analysis of a subsonic centrifugal compressor impeller with splitter blades[J]. Journal of Aerospace Power, 2013, 28(11): 2495-2502.

CFD result validation and analysis of a subsonic centrifugal compressor impeller with splitter blades

  • Received Date: 2012-10-29
  • Publish Date: 2013-11-28
  • A subsonic centrifugal compressor impeller with splitter blades of 1.5 pressure ratio was analyzed by CFD software of Numeca using Spalart-Allmaras(S-A) and shear stress transport(SST) models to study the accuracy of numerical simulation results. The measured results of the impeller and verifications of CFD at four sections were presented with respect to the velocity distribution, etc. Results show that the simulation results of S-A and SST models are almost the same, with the difference less than 1%; In general, the numerical simulation agrees well with the experiment, the difference is less than 2% at design point and 6% in off-design condition. The difference of numerical simulation and experiment results of velocity distribution is large in different cross sections. There are relatively big differences about 20% near hub and more than 100% near shroud, which can not truly reflect the flow condition near the shroud.

     

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