Numerical investigation of effect of a centrifugal boost impeller on suction performance of an aircraft hydraulic pump  

作　　者：Hongkang DONG Yongling HE Yan WANG Guiyue KOU 

机构地区：[1]School of Transportation Science and Engineering,Beihang University,Beijing 100083,China [2]School of Mechanical and Electrical Engineering,Nanchang Institute of Technology,Nanchang 330099,China

出　　处：《Chinese Journal of Aeronautics》2022年第8期236-248,共13页中国航空学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51775013);the Science and Technology Research Project of Jiangxi Provincial Department of Education(No.GJJ201914)。

摘　　要：An integrated boost impeller can effectively improve the suction performance of an aircraft hydraulic pump(AHP).It must be designed very carefully;however,few studies thus far have investigated boost impellers.To explore the effect of the boost impeller,this study developed a three-dimensional computational fluid dynamics(CFD)model for an AHP based on the k-εturbulence model and full cavitation model.The results of verification tests demonstrated that the model is reliable for simulating the delivery characteristics of piston pumps and the boost capacity of the inlet impeller.Steady-state simulations reveal that the boost impeller can remarkably improve the suction performance and mitigate the cavitation damage due to insufficient fluid filling while only consuming a small proportion of the total input power.Transient-state simulations show that the pump with an impeller is more capable of catching up with a sudden increase in flow demand,and it has a lower suction flow ripple and impact.However,such a boost impeller also has some limitations such as magnifying the suction pressure fluctuation and having little effect on mitigating the cavitation caused by the back-flow jet.

关 键 词：Aircraft hydraulic pump CAVITATION Computational Fluid Dynamics IMPELLER Suction performance Transient flow 

分 类 号：V245.1[航空宇航科学与技术—飞行器设计]