采用环形入口壳体的诱导轮汽蚀性能研究  

Study on Cavitation Performance of Inducer with Annulus Inlet Casing

作　　者：唐飞[1] 李家文[1] 陈晖[2] 李向阳[2] 宣统[2] 

机构地区：[1]北京航空航天大学宇航学院,北京100191 [2]西安航天动力研究所,西安710100

出　　处：《机械工程学报》2011年第4期171-176,共6页Journal of Mechanical Engineering

摘　　要：针对某型号液体火箭发动机离心泵所发生汽蚀问题,在基于SIMPLEC算法上,采用雷诺时均Navier-Stokes方程(简称N-S方程)控制方程、Realizable k-ε湍流模型和mixture多相流模型,对泵环形入口壳体和诱导轮进行汽蚀性能研究。在数值流场计算研究中,分析各部件对诱导轮汽蚀性能的影响,发现诱导轮及环形入口壳体内流场的不对称性降低诱导轮的汽蚀性能。通过合适调整环形入口壳体面积比以及环形入口壳体出口与诱导轮之间的距离,使环形入口壳体出口流场收缩,在加速流中获得较均匀的速度场,改善了诱导轮入口流动参数,提高了诱导轮的汽蚀性能。所采用的改进方法对液体火箭发动机离心泵的研制和优化具有一定的指导意义。In order to better understand the occurrence of cavitation in a certain centrifugal pump of liquid rocket engine,on the basis of SIMPLEC algorithm,the study on cavitation performance of the inducer with annulus inlet casing is carried out by using the time-averaged N-S equation,Realizable k-ε turbulent model and mixture multiphase model.In the process of flow field calculation,the effect of each component on cavitation performance is analyzed.The results indicate that asymmetry flow in the inducer and annulus inlet casing depress the cavitation performance of inducer.Finally,by modifying the area ratio of annulus inlet casing and adjusting the axial distance between the casing and inducer,the exit flow of annulus inlet casing is contracted and uniform velocity distributions are obtained in accelerated flow.Thus,the flow parameters at the entrance of inducer are improved,and the cavitation performance of inducer is enhanced.The adopted corrective method has certain directive significance to the development and optimization of centrifugal pumps of liquid rocket engine.

关 键 词：离心泵 环形入口壳体 诱导轮 汽蚀性能 

分 类 号：V434.2[航空宇航科学与技术—航空宇航推进理论与工程]