结构参数对引射器性能的影响规律  

The Influence of Structural Parameters on Ejector Performance

作　　者：史明涛 李学锐 张剑 李波 SHI Mingtao;LI Xuerui;ZHANG Jian;LI Bo(Dongfeng Motor Corporation Research&Development Institute,Wuhan 430058,China)

机构地区：[1]东风汽车集团有限公司研发总院,武汉430058

出　　处：《汽车工程学报》2024年第4期715-722,共8页Chinese Journal of Automotive Engineering

摘　　要：以燃料电池用氢气引射器为研究对象,通过建立引射器内部流场CFD仿真模型,研究了喷嘴直径Dt、喷嘴角度φ和混合室直径D等结构参数对引射器性能的影响规律。结果表明,在不同功率段,结构参数对引射器性能的影响规律不同。在低功率段,引射比随着喷嘴角度的增大而显著增大,在高功率段,引射比随着喷嘴角度的增大而减小。混合室直径D对引射性能的影响则相反,在低功率段,引射比随着混合室直径的增大而减小,在高功率段,引射比随着混合室直径的增大而增大。基于上述影响规律,形成了引射器关键参数设计选取方法,并给出了参数优化设计区间。Focusing onthe hydrogen ejector used in fuel cells,a CFD simulation model was established to study the influence of structural parameters,such as the nozzle throat diameter Dt,the nozzle angleφand the mixing chamber diameter D,on the ejector's performance.The results show that the influence of structural parameters on the ejector's performance varies across different power levels of the fuel cell stack.In the low-power range,the entrainment ratio significantly increases with the nozzle angle,while in the high-power range,the entrainment ratio decreases as the nozzle angle increases.The influence of the mixing chamber diameter on the ejector's performance is opposite.In the low-power range,the entrainment ratio decreases as the mixing chamber diameter increases,while in the high-power range,the entrainment ratio increases with the mixing chamber diameter.Based on the influence patterns,the design method for key structural parameters of the ejector was developed,and the optimal parameter range was obtained.

关 键 词：引射器 参数优化 喷嘴直径 喷嘴角度 混合室直径 

分 类 号：TM911.4[电气工程—电力电子与电力传动]