喷嘴位置及结构对液气射流泵喷射性能的影响  

Influence of Nozzle Position and Structure on the Ejection Performance of Liquid-Gas Jet Pump

作　　者：赵丽娟[1,2] 张志军 高伟峰[1] 郭家玮 何天一 刘奕新 ZHAO Lijuan;ZHANG Zhijun;GAO Weifeng;GUO Jiawei;HE Tianyi;LIU Yixin(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;School of Mechanical Engineering,Ningxia Institute of Science and Technology,Shizuishan 753000,China)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819 [2]宁夏理工学院机械工程学院,石嘴山753000

出　　处：《真空科学与技术学报》2024年第12期1019-1025,共7页Chinese Journal of Vacuum Science and Technology

基　　金：宁夏回族自治区教育厅高等学校科研项目(NGY2022150);宁夏回族自治区青年科技人才托举工程项目(2021-53)。

摘　　要：针对液气射流泵内部流动过程十分复杂,效率较低的问题,文章采用Fluent软件分析液气射流泵内部流场的变化规律。模拟研究了不同喉径比、不同喷嘴位置、不同喷嘴结构对液气射流泵喷射性能的影响。结果表明:射流泵喉部直径与喷嘴出口直径的比值直接影响到射流泵的喷射性能,喉径比存在最优值,当喉径比为2时,射流泵的引射系数最大;当射流泵喷嘴距离混合室入口之间的距离不同时,射流泵的引射性能也不同,当喷嘴距取70 mm时,射流泵的引射系数最大;当采用不同喷嘴结构时,余弦喷嘴的引射性能最好,圆柱喷嘴的引射性能最差。In response to the complex internal flow process and low efficiency of liquid gas jet pumps,this paper uses Fluent software to analyze the variation law of the internal flow field of liquid gas jet pumps.The influence of different throat diameter ratios,nozzle positions,and nozzle structures on the jet performance of liquid gas jet pumps was simulated and studied.The results show that the ratio of the throat diameter of the jet pump to the nozzle outlet diameter directly affects the jet performance of the jet pump,and there is an optimal throat diameter ratio.When the throat diameter ratio is 2,the injection coefficient of the jet pump is maximized.When the distance between the nozzle of the jet pump and the inlet of the mixing chamber is different,the injection performance of the jet pump is also different.When the nozzle distance is 70 mm,the injection coefficient of the jet pump is the highest.When different nozzle structures are used,the cosine nozzle has the best injection performance,while the cylindrical nozzle has the worst injection performance.

关 键 词：射流泵 喷嘴 喷射性能 

分 类 号：TK172[动力工程及工程热物理—热能工程]