低比转速液氢潜液泵低温性能研究  

Investigation of cryogenic performance in a low specific speed submerged liquid hydrogen pump

作　　者：穆振东 刘贻雄 纪晶晶 高彦峰 Mu Zhendong;Liu Yixiong;Ji Jingjing;Gao Yanfeng(Beijing Space Launch Technology Institute,Beijing 100076,China)

机构地区：[1]北京航天发射技术研究所,北京100076

出　　处：《低温工程》2025年第2期103-110,共8页Cryogenics

摘　　要：采用试验与数值计算方法,研究了自主设计的低比转速液氢潜液泵的低温性能。通过搭建的液氢潜液泵低温性能试验平台,测试了液氢潜液泵在液氮介质下的工作特性和水力性能。数值计算方法采用SST k-ω湍流模型分析了液氢潜液泵的流动特性,预测的水力性能与试验结果吻合较好。数值计算结果表明低比转速液氢潜液泵流量-扬程曲线较为平坦。在小流量工况下,离心泵流道流动分布不均匀,部分流道发生堵塞,存在大量的大尺度低速旋涡;在大流量工况下,旋涡尺度减小,流动趋于稳定,但部分叶片的吸力面仍存在流动分离现象。Cryogenic performance of a self-designed low specific speed submerged liquid hy-drogen pump was investigated by integrated experimental and numerical methods.An experimen-tal platform was constructed to test the operational behavior and hydraulic performance of the sub-merged liquid hydrogen pump under liquid nitrogen(LN2)conditions.Numerical calculation meth-od was used to analyze the flow characteristics of the submerged liquid hydrogen pump employing the SST k-ωturbulence model.The predicted hydraulic performance is in good agreement with the experimental measurements.The numerical results show the low specific speed submerged liquid hydrogen pump exhibits a relatively flat head-flow curve.Under the low flow rate conditions,flow maldistribution occurs within the centrifugal pump passages,with partial blockage in partial passa-ges accompanied by dominant large-scale low velocity vortices.At high flow rate operations,al-though vortex scale decreases and flow stability enhances,flow separation is observed on suction surfaces of specific blades.

关 键 词：液氢潜液泵 低比转速 水力性能 

分 类 号：TB655[一般工业技术—制冷工程]