Abstract: The tip-leakage vortex of the rotor blade for a pump-jet propulsor not only reduces the cavitation performance of the propulsor, but also causes significant tip leakage pressure pulsation and unsteady excitation force, thereby reducing the acoustic performance of the propulsor. Therefore, pump-jet tip-leakage vortex control is an effective way to improve the acoustic performance of the propulsor. A tip-vortex control method based on the tip-winglet has been proposed for a pump-jet propulsor with pre-swirl stators. High-precision numerical simulation method is then used to compare and analyze the propulsion performance, flow field structure and pressure pulsation of the pump-jet propulsor before and after suppressing tip vortices. The results show that the rotor tip vortex control method based on the tip-winglet can significantly suppress the development of the pump-jet tip vortices and the pressure pulsation in tip clearance, however, it has little impact on the hydrodynamic performance of the propulsor. It can provide references for the acoustic optimization of the pump-jet propulsor.

Key words: pump-jet propulsor, tip vortex, control method, numerical simulation, pressure pulsation

摘要： 泵喷推进器转子叶片梢涡不仅会降低推进器空化性能,而且会引起较大的梢隙压力脉动和非定常激励力,从而降低推进器声学性能。因此,泵喷梢隙涡控制是提升推进器声学性能的有效途径。该文针对某前置定子泵喷推进器,提出基于叶梢翼的梢涡控制措施,并利用高精度数值仿真方法对比分析了抑制梢涡前后的泵喷推进器推进性能、流场结构、压力脉动等特性。研究结果表明：基于叶梢翼的转子梢涡控制方法可显著抑制泵喷梢涡发展和叶梢间隙压力脉动,并且对推进器的水动力性能影响较小,可为泵喷推进器声学优化提供参考。

关键词: 泵喷推进器, 叶梢涡, 控制方法, 数值仿真, 压力脉动