引射器二次流入口结构对引射性能的影响  

Influence of Secondary Inlet Structure of Ejector on the Ejection Performance

作　　者：周少东 史新民[3] 俞齐鑫 王子成 吴婷 李子健 ZHOU Shaodong;SHI Ximin;YU Qixin;WANG Zicheng;WU Ting;LI Zijian(Institute of Advanced Manufacturing and Moden Equipment Engineering Technology,Jiangsu University,Zhenjiang 212013,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou 213164,China;School of Intelligent Equipment,Changzhou College of Information Technology,Changzhou 213164,China)

机构地区：[1]江苏大学先进制造与现代装备工程技术研究院,江苏镇江212013 [2]江苏省绿色过程装备重点实验室,江苏常州213164 [3]常州信息职业技术学院智能装备学院,江苏常州213164

出　　处：《现代车用动力》2023年第3期1-4,共4页Modern Vehicle Power

基　　金：常州市应用基础研究(CJ20220033);江苏高等学校自然科学基金(20KJB470010)。

摘　　要：作为五部委联合发布八项核心技术之一,氢气循环系统技术路线逐渐从氢气循环泵转向引射器。然而,采用引射器技术路线的典型问题之一就是难以全功率覆盖,需要更为精细的引射器优化设计。主要研究二次流入口结构参数对引射性能的影响,基于Ansys-Fluent软件,采用混合湿氢气介质,体积分数分别为氢气81%、水蒸气11%、氮气8%,建立引射器三维物理模型及其数值计算模型,数值分析不同二次流结构参数对引射性能影响。计算结果表明:不同的二次流入口结构对引射性能影响较小,其机理为二次流结构制约着混合段的流动混合,导致混合程度不同,进而影响引射性能。上述结果能为高效、全功率覆盖车用燃料电池系统引射器的设计提供理论依据。As one of the eight core technologies jointly released by five ministries and commissions,the technical route of hydrogen circulation system gradually shifted from hydrogen circulation pump to ejector.However,one of the typical problems of using ejector technology route is full power coverage,which requires more refined ejector optimization design.It mainly studies the influence of the structural parameters of the secondary inlet on the ejector performance.Based on the Ansys-Fluent software,a three-dimensional physical model and a numerical calculation model of the ejector are established by using a mixed wet hydrogen medium with a volume fraction of 81%hydrogen,11%water vapor,and 8%nitrogen,respectively.The effects of different secondary flow structural parameters on the ejector performance are analyzed numerically.The calculation results show that different secondary flow structures have litle effect on the ejector performance,and the mechanism is that the secondary flow structure restricts the flow mixing in the mixing section,resulting in different mixing levels,which further affects the ejector performance.The above results can provide a theoretical basis for the design of the ejector of high efficiency and full power coverage vehicle fuel cell system.

关 键 词：燃料电池 引射器 计量比 二次流 流动混合 

分 类 号：U473.4[机械工程—车辆工程]