低温液氮泵空化模型修正及内部流动数值研究  

Modification of cavitation model and numerical study on internal flow in a cryogenic liquid nitrogen pump

作　　者：许洋 邵春雷[1,2] Xu Yang;Shao Chunlei(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China;Jiangsu Key Laboratory of Green Process Equipment,School of Mechanical Engineering Changzhou University,Changzhou 213164,China)

机构地区：[1]南京工业大学机械与动力工程学院,南京211800 [2]常州大学机械工程学院江苏省绿色过程装备重点实验室,常州213164

出　　处：《低温工程》2019年第1期25-30,共6页Cryogenics

基　　金：国家自然科学基金资助项目(51306087);江苏省"六大人才高峰"项目(GDZB-032);江苏省高等学校自然科学研究重大项目(17KJA480003);江苏省绿色过程装备重点实验室开放课题基金资助项目(GPE201704)

摘　　要：为了研究低温泵内的空化流动,考虑热力学效应,对现有Zwart空化模型进行了修正,并通过NACA0015水翼的空化实验验证了修正后模型的可行性。同时采用数值模拟的方法分析低温泵在输送液氮介质时所产生的空化流动现象,获得了低温泵的空化性能、叶片表面中间流线上的载荷分布情况和流道内的温度分布规律。研究结果对准确预测低温泵的空化性能,提高低温泵的抗空化能力具有意义。Cryogenic pump is a kind of centrifugal pump used to transport cryogenic medium,which is more prone to cavitation than ordinary pump.In order to study the cavitation flow in cryopump,the existing Zwart cavitation model was modified by considering the thermodynamic effect,and the feasibility of the modified model was verified by the cavitation experiment of NACA0015 hydrofoil.At the same time,the cavitation flow phenomena of cryopump when transporting liquid nitrogen medium are analyzed by numerical simulation.The cavitation performance of cryopump,the load distribution on the middle streamline of blade surface and the temperature distribution in the pump channel are obtained.The research results can be used for reference in accurately predicting the cavitation performance of cryopump and improving the anti-cavitation ability of cryopump.

关 键 词：低温液氮泵 热力学效应 空化模型 数值模拟 

分 类 号：TB655[一般工业技术—制冷工程]