燃油离心泵多目标优化设计及仿真分析

Aiming at the optimization design for a fuel centrifugal pump with high efficiency and high anti-cavitation performance, a multi-objective optimization design based on loss-model and SQP (Sequential Quadratic Programming) was proposed and simulated. A combined loss-model was established which characterized the pump hydraulic, volumetric, and mechanical efficiencies. Meanwhile, the cavitation function was established and characterized by the required net positive suction head. Then, a reasonable fitness function was constructed by SQP and the related mathematical model for multi-objective optimization was completed. According to the simulations of different optimization algorithms, the results of selected algorithms are almost similar but the SQP uses the fewest iterative steps. Finally, the pump external performance was predicted by CFD to verify the effectiveness of proposed multi-objective optimization design method. Compared to that of traditional pump, the flow-loss of optimized pump is lower and inlet flow condition is more beneficial to anti-cavitation. Additionally, its high-efficiency zone is wider and the required net positive suction head is lower. Therefore, the pump efficiency and anti-cavitation performance are both regulated and improved.