Compensation of Axial Force Gap Between Induction Wheel and Impeller Combined With Impeller for Centrifugal Pump
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At present, the effect of induction wheel and impeller on the performance of aviation fuel centrifugal pump is not clear. to solve this problem, two induction wheels and impeller with equal pitch and variable pitch are designed and studied. under five working conditions q 0.6 q、0.8q、1.0q、1.2q and 1.4, respectively, three models of fixed pitch induction wheel and impeller, variable pitch induction wheel and impeller and no guide wheel and impeller are numerically simulated, and the velocity and pressure distribution of flow field in pump are obtained. The analysis results show that the pump head can be slightly increased by adding the induction wheel and impeller before the main impeller of the fuel pump. Compared with the equal pitch induction wheel and impeller, the effect of variable pitch induction wheel and impeller is better. After adding the induction wheel and impeller, the flow condition of the inlet of the main impeller is improved, especially in the case of large flow rate, the distribution of the low pressure zone is reduced, and the influence of the induction wheel and impeller on the flow rate of the pump is mainly concentrated in the inlet of the impeller.
Aviation Fuel; Centrifugal Pump; Centripetal Force Compensation