变螺距诱导轮对液氢泵空化性能的影响  

Effect of variable pitch inducer on cavitation performance of liquid hydrogen pump

作　　者：房煦峰 侯予[1] 蔡毅杰 刘玉涛[2] 丁文静[3] 赖天伟[1] 陈双涛[1] Fang Xufeng;Hou Yu;Cai Yijie;Liu Yutao;Ding Wenjing;Lai Tianwei;Chen Shuangtao(School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049,China;Beijing Institute of Aerospace Test Technology, Beijing 100074,China;Beijing Institute of Satellite Environmental Engineering, Beijing 100029,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]北京航天试验技术研究所,北京100074 [3]北京卫星环境工程研究所,北京100029

出　　处：《低温工程》2020年第3期43-47,68,共6页Cryogenics

基　　金：国家自然科学基金(No.51976150);陕西省重点研发计划(2018ZDXM-GY-07);陕西高校青年创新团队。

摘　　要：以液氢泵内的空化流动为研究对象,构建了液氢泵内流动的数值模型。采用考虑热力学修正后的ZGB空化模型和标准湍流模型,对变螺距诱导轮对液氢泵空化性能的影响进行了数值模拟,获得了有无诱导轮对泵内叶片载荷、流道内温度分布规律以及空化现象的影响规律。结果表明:采用诱导轮提升了进入叶轮前的流体静压,降低液氢泵的临界空化数,拓展了泵的稳定工作范围。研究结果为优化液氢泵用诱导轮几何结构,提高液氢泵的抗空化性能提供了参考。Taking the cavitation flow in liquid hydrogen pump as the research object,the numerical model of the flow in liquid hydrogen pump was established.The thermodynamic modified ZGB cavitation model and the standard turbulence model were used to simulate the effect of variable pitch inducer on the cavitation performance of the liquid hydrogen pump.The influences of inducer on the blade load,the temperature distribution in the passage and cavitation were obtained.The results show that the inducer improves the hydrostatic pressure before entering the impeller,reduces the critical cavitation number of the liquid hydrogen pump,and expands the stable working range of the pump.The results provide a reference for optimizing the geometrical structure of variable pitch inducer and improving the anti-cavitation performance of liquid hydrogen pump.

关 键 词：液氢泵 诱导轮 空化 热力学效应 

分 类 号：TH311[机械工程—机械制造及自动化] TB663[一般工业技术—制冷工程]