@Article{fdmp.2022.019617,
AUTHOR = {Ting Zhang, Denghao Wu, Shijun Qiu, Peijian Zhou, Yun Ren, Jiegang Mou},
TITLE = {LES Analysis of the Unsteady Flow Characteristics of a Centrifugal Pump Impeller},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {18},
YEAR = {2022},
NUMBER = {5},
PAGES = {1349--1361},
URL = {http://www.techscience.com/fdmp/v18n5/47956},
ISSN = {1555-2578},
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 stall is generated near the suction side of the blade inlet, grows towards the high-pressure
side of the blade in the circumferential direction, and gradually attenuates. As the flow rate decreases, the number
of stalls remains unchanged, while the related influencing area and strength gradually increase and the circumferential velocity increases.},
DOI = {10.32604/fdmp.2022.019617}
}