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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1998, Vol. 19 ›› Issue (5): 556-559.

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STUDY OF NUMERICAL SIMULATION WITH UNSTRUCTURED GRID ON TURBULENT FLOW IN ROTATING CENTRIFUGAL IMPELLER

Zhang Chuhua, Liu Zhengxian, Gu Chuangang, Miao Yongmiao   

  1. Department of Fluid Engineering, Xi'an Jiaotong University, Xi'an, 710049
  • Received:1997-12-08 Revised:1998-03-27 Online:1998-10-25 Published:1998-10-25

Abstract:

A SIMPLE collocated unstructured grid method for the computation of turbulent flow in a rotaing centrifugal impeller is presented. The unstructured grids are generated using a modified advancing front method. The governing equations represented by the general convection diffusion forms are discretized using the finite control volume method. The standard k ε turbulence model with the wall function law is adopted. The discrete algebraic equation systems are solved using CGS method with incomplete LU preconditioner. The proposed method is used to calculate turbulence flow fields within a rotaing centrifugal impeller. The overall concidence between computation results and measurements shows that the above algorithm is reasonable and can be a useful tool for predicting the turbulent flow.

Key words: computat ional fluid dynam ics, unst ructured grids, cent rifugal impeller, turbulent flow, conjugate gradient squared method

CLC Number: