低温高速屏蔽泵汽蚀性能的流热耦合分析  

Cavitation performance analysis for cryogenic high-speed canned pump based on coupled flow-heat

作　　者：孔繁余[1] 蒋万明[1] 王文廷[2] 沈小凯[3] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]西安航天动力研究所,陕西西安710100 [3]一汽解放汽车有限公司无锡柴油机厂,江苏无锡214026

出　　处：《华中科技大学学报（自然科学版）》2012年第5期24-28,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家科技支撑计划资助项目(2008BAF34B10)

摘　　要：针对低温高速屏蔽泵输送易汽化介质时,在流道内容易因温度升高引起介质汽化的问题,考虑温度变化对低温介质热性能参数的影响,采用流热耦合方法对一台液化天然气泵在不同工况下进行了全流场数值模拟.分析了诱导轮的压力分布和汽蚀性能,得到了温度升高最大区域屏蔽套间隙内介质的温度、压力分布以及介质与电机之间的对流换热信息.分析结果表明:高压冷却润滑回路能满足低温高速屏蔽泵输送液化天然气等易汽化介质的要求,整个流道内不会发生汽化现象.As cryogenic high-speed caned pump could produce vaporization caused by the improvement of temperature in the channel in the process of pumping which are easily vaporized fluid, the method of coupled flow-heat was used to simulate whole flow field of a liquefied natural gas （LNG） pumped at different running conditions by considering the transform of thermal performance parameter of cryogenic fluid caused by temperature change. Pressure distribution and cavitation performance of the inducer were investigated. The information, such as temperature, pressure distribution in the gap of shield sleeves where temperature changed greatly, and the conditions of heat exchange between fluid and motor were also gained. It can be concluded that high-pressure circulation loop for cooling and lubrication can meet the requirement of cryogenic high-speed canned pump to pump in which fluid are easy vaporized and vaporization will not happen in the channel.

关 键 词：屏蔽泵 诱导轮 汽蚀 低温 流热耦合 

分 类 号：TH311[机械工程—机械制造及自动化]