Numerical Simulation of Unsteady Flow in Centrifugal Pump Impeller at Off-Design Condition by Hybrid RANS/LES Approaches
A new kind of hybrid RANS/LES turbulence modeling method-SST based SAS model is first time used for studying the stall phenomena in a centrifugal pump impeller at off-design condition in present paper. The previous reported two channel non-uniform flow structure has been gotten with this model. The numerical result is compared with LES and unsteady SST model, also the PIV result in reference paper. The time average result of flow show good agreements in general. The difference in turbulence quantities will affect the time average field in high turbulence intensity area to make SAS having close to LES. To achieve this effect, more computation consumption has been taken.
Flow visualization centrifugal impeller hybrid RANS/LES off- design condition
Wei Zhang Yunchao Yu Hongxun Chen
Shanghai Institute of Applied Mathematics and Mechanics, Guang Yan road 123.20072 Shanghai, China
国际会议
The Second International Conference on High Performance Computing and Applications(第二届高性能计算及应用国际会议)
上海
英文
571-578
2009-08-10（万方平台首次上网日期，不代表论文的发表时间）