诱导轮对高速液氧泵空化流场影响研究  

Effect of an inducer on cavitation flow field of a high-speed liquid-oxygen-pump

作　　者：窦唯[1] 蒋文山 李超群 高永新 姚程 DOU Wei;JIANG Wenshan;LI Chaoqun;GAO Yongxin;YAO Cheng(Beijing Aerospace Propulsion Institute,Beijing 100076,China;College of Civil Engineering,Hefei university of Technology,Hefei 230009,China)

机构地区：[1]北京航天动力研究所,北京100076 [2]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《振动与冲击》2024年第8期280-286,共7页Journal of Vibration and Shock

基　　金：国防技术基础科研项目(JSZL2019203A003)。

摘　　要：高抗空化诱导轮可以改善液氧泵的空化特性,提高大推力火箭的可靠性。基于计算流体力学方法,建立了高速液氧泵的流动仿真模型,通过三组试验工况验证了模型准确性,研究了诱导轮叶片数对液氧泵性能和空化特性的影响。结果表明:使用诱导轮可以减小离心轮空化面积,代偿离心轮的汽蚀,提高液氧泵扬程;在入口流量和出口压力不变的条件下,增加诱导轮叶片数,液氧泵的效率增加,扬程降低,离心轮空化面积增加,诱导轮代偿离心轮汽蚀能力削弱。综合考虑液氧泵性能参数和空化特性,三叶片诱导轮能够满足大推力液体火箭的高可靠性要求。A high anti-cavitation inducer improves the cavitation characteristics of the liquid-oxygen-pump and enhances the reliability of heavy-lift rockets.Based on a computational fluid dynamics method,a geometry of the high-speed liquid-oxygen-pump was established to simulate its flow field.The accuracy of numerical model was validated with three test conditions.Effects of the inducer-blade number on the performance and cavitation characteristics of the liquid-oxygen-pump were investigated in the present work.It was found that the implementing inducer compensates for the cavitation in the centrifugal wheel by reducing the cavitation area and improves the pumping head of the liquid-oxygen-pump.When the inflow mass flow rate and the outflow pressure keep constant,increasing the inducer-blade number enhances the liquid-oxygen-pump efficiency,but reduces the pumping head.Meanwhile,the ability of compensating cavitation weakens where the cavitation area increases in the centrifugal wheel.Considering the performance and cavitation characteristics of the pump,the inducer with three-blades satisfies the high reliability requirement for the heavy-lift rockets.

关 键 词：高速液氧泵 诱导轮 空化特性 数值模拟 

分 类 号：V434.212[航空宇航科学与技术—航空宇航推进理论与工程]