Numerical and Experimental Analysis of the Influence of Impeller Structure on Slurry Pumps Performance
As an important equipment for transporting coal,slurry pumps are widely used in fossil energy fields such as coal mines and coal-fired power plants,improving the performance of slurry pumps can effectively reduce energy losses in the fossil energy industry.A new type of impeller with a splitter blade structure was proposed,and the internal flow field of slurry pumps with different impeller structures was analyzed.Based on the shape and structure of the vortex inside the slurry pump,the vortex is divided into leading edge vortex,trailing edge vortex,and gap leakage vortex using the Q criterion.The generation mechanism of each vortex and the relationship between vortex strength and flow state are analyzed.The energy loss of slurry pump was studied using entropy production theory,and the pressure distribution of different impeller structures under two-phase flow conditions was discussed.The results indicate that the use of splitter blades can reduce the energy loss caused by entropy production in the slurry pump and suppress flow separation at the impeller outlet.
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