Ting Zhang1, Denghao Wu1,2,*, Shijun Qiu2, Peijian Zhou1, Yun Ren3, Jiegang Mou1
FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.5, pp. 1349-1361, 2022, DOI:10.32604/fdmp.2022.019617
Abstract Stall phenomena increase the complexity of the internal flow in centrifugal pump impellers. In order to tackle this
problem, in the present work, a large eddy simulation (LES) approach is applied to determine the characteristics
of these unstable flows. Moreover, a vorticity identification method is used to characterize quantitatively the
vortex position inside the impeller and its influencing area. By comparing the outcomes of the numerical simulations and experimental results provided by a Particle Image Velocimetry (PIV) technique, it is shown that an
apparent “alternating stall” phenomenon exists inside the impeller when relatively small flow rate conditions
are considered. The… More >
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