Study on the internal characteristics of stall in a centrifugal pump by a cubic non-linear SGS model
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The stall in a centrifugal pump impeller at quarter-load condition is investigated using a third-order SGS model named DCNM, aiming at a better understanding of the rotation effect on the stall phenomenon. The study on the distributions of Reynolds stresses, production term and rotation term reveals that the joint effect of production and rotation results in the non-uniform Reynolds stress distribution. Further study on the two components of the summation of production and rotation shows that the joint effect of them is transporting certain energy from Reynolds component Rvv to Ruu.
Key wordsCentrifugal pump large-eddy simulation non-linear model OpenFOAM stall
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