Optimal design of low specific speed mixed flow pump impeller
Jia Ruixuan, Xu Hong
(Key Laboratory of Condition Monitoring and Control for Power Plant Equipment (North China Electric Power University), Ministry of Education, Beijing 102206, China)
Abstract：To overcome the condition that there is short of work over rule of variation about radial parameters in allusion to traditional low specific speed mixed flow pump impeller design, a novel strategy using for reference of steam turbine axial flow impeller design experience is proposed. In the first instance, according to inner flow loss theory, the reason engendering secondary flow in impeller flow path passage section was clarified. Subsequently, a new method degrading secondary flow was discovered by advanced control flow theory. And then, radial parameters optimization design was achieved by NUMECA, a commercial CFD software on the condition of the vane parametric modeling. It can increase pump efficiency effectively. The calculation case shows that advanced control flow theory is an valid method to integrate inner flow analyzing and optimization design, and it can achieve impeller quickly and with high efficiency design.
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