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.

[1]  Christian Brix Jacobsen,et al.  Flow in a Centrifugal Pump Impeller at Design and Off-Design Conditions—Part I: Particle Image Velocimetry (PIV) and Laser Doppler Velocimetry (LDV) Measurements , 2003 .

[2]  Charles Meneveau,et al.  Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—II: Addressing Passage-Averaged and Large-Eddy Simulation Modeling Issues in Turbomachinery Flows , 2000 .

[3]  Christian Brix Jacobsen,et al.  Flow in a Centrifugal Pump Impeller at Design and Off-Design Conditions—Part II: Large Eddy Simulations , 2003 .

[4]  T. S. Lee,et al.  Numerical Flow Simulation in a Centrifugal Pump at Design and Off-Design Conditions , 2007 .

[5]  Friedrich-Karl Benra,et al.  Unsteady flow visualization at part-load conditions of a radial diffuser pump: by PIV and CFD , 2009, J. Vis..

[6]  José M. González,et al.  Numerical Simulation of the Dynamic Effects Due to Impeller-Volute Interaction in a Centrifugal Pump , 2002 .

[7]  José M. González,et al.  Unsteady Flow Structure and Global Variables in a Centrifugal Pump , 2006 .

[8]  R. A. Van den Braembussche,et al.  Experimental investigation of the flow in the vaneless diffuser of a centrifugal pump by particle image displacement velocimetry , 1989 .

[9]  Florian R. Menter,et al.  A Scale-Adaptive Simulation Model for Turbulent Flow Predictions , 2003 .

[10]  Joseph Katz,et al.  Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—I: On Flow Structures and Turbulence , 2000 .

[11]  Michel Stanislas,et al.  PIV Measurements in the Impeller and the Vaneless Diffuser of a Radial Flow Pump in Design and Off-Design Operating Conditions , 2002 .

[12]  Hiroshi Tsukamoto,et al.  Experimental and Numerical Study of Unsteady Flow in a Diffuser Pump at Off-Design Conditions , 2003 .