高速诱导轮离心泵的汽蚀振荡与控制

Cavitation Oscillations and it's Control of High-speed Centrifugal Pump

为获得更小的质量、更大的推质比,高速诱导轮离心泵中的诱导轮常在潜在汽蚀情况下工作,利用汽穴分割原理进行诱导轮设计方法的研究,实现了诱导轮表面汽穴分布的主动改变,从而达到提高诱导轮离心泵抗汽蚀振荡稳定性的目的。对比试验表明:改进方案离心泵的效率和扬程与原方案相当,改进方案大幅降低泵的压力脉动,使用改进方案改善诱导轮离心泵抗汽蚀振荡稳定性是可行的。

In the liquid propellant rocket engine,in order to obtain more high performance and the lighter quality,general design the inducer to work under the condition of potential cavitation.Although the potential cavitation in the pump will not have a significant impact on the steady-state output parameters of the pump,it will change the dynamic characteristics of the system and cause self-excited oscillation of pressure and flow of the hydraulic system under specific conditions.Serious cavitation oscillation will reduce the reliability of the pump products and even lead to product breakdown.The advantage of cavitation division theory to design inducer,changing the cavitation distribution on the surface of the inducer is taken blades actively,and improving the stability of the inducer centrifugal pump against cavitation oscillation.The comparative test shows that the efficiency and head of the improved scheme are equal to the original scheme,the improved scheme can significantly reduce the pressure pulsation of the pump,and it is feasible to improve the stability of the inducer centrifugal pump against cavitation oscillation by using the improved scheme.