缝隙诱导轮多工况汽蚀性能研究  

Study on cavitation performance of gap inducer under multi-operating conditions

作　　者：王文廷[1] 许开富[1] 李永鹏[1] 严俊峰[1] WANG Wenting;XU Kaifu;LI Yongpeng;YAN Junfeng(Xi'an Aerospace Propulsion Institute,Xi'an 710100,China)

机构地区：[1]西安航天动力研究所,陕西西安710100

出　　处：《火箭推进》2019年第1期8-13,共6页Journal of Rocket Propulsion

基　　金：中国航天科技集团公司支撑项目(2011TY09)

摘　　要：针对某流量工况变比20的高速离心泵,为提升其变工况抗汽蚀性能,提出了缝隙诱导轮方案。分别进行了常规变螺距诱导轮和缝隙诱导轮泵汽蚀仿真计算和水力性能试验,分析了多工况泵的汽蚀断裂特性和汽蚀气泡分布等流场特征,获得了两种诱导轮泵多工况汽蚀性能和外特性。结果表明,与常规诱导轮相比,缝隙诱导轮拓宽了高速离心泵稳定工作工况范围,小流量工况泵的抗汽蚀性能明显提升,额定工况汽蚀性能相当;缝隙诱导轮小流量工况效率略有提升,大流量工况泵效率和扬程均有降低。To improve the anti-cavitation performance of a high speed centrifugal pump with a variable flow ratio of 20, a gap inducer was designed.The cavitaion simulation calculation and hydrodynamic performance test of pumps with conventional variable-pitch inducer and gap inducer were carried out, respectively , respectively.The head cavitation collapse characteristics of the pump under multi-operating conditions and the flow fields characteristics, such as the cavitation bubble distribution of the inducer blade channels were analyzed.The cavitation performance and external characteristics of two centrifugal inducer pump under multi-operating conditions were obtained.The results show that the gap inducer increase the operating range of the high speed centrifugal pump, compared with conventional inducer.Besides, the anti-cavitation performance of the pump with low flow rate is improved significantly.Meanwhile, the cavitation performance under design condition is nearly the same.On the other hand, the efficiency of the gap inducer with the small flow rate is slightly improved, while the efficiency and head of the pump with the large flow rate are both reduced.

关 键 词：缝隙诱导轮 多工况 汽蚀性能 

分 类 号：V434.21[航空宇航科学与技术—航空宇航推进理论与工程]