摘要
燃料电池电动汽车是新能源汽车的重要发展方向,燃料电池作为整车的核心能量单元,其工作性能直接影响车辆经济性、动力性及可靠性。氢气循环系统中,引射器是燃料电池的重要功能元件,文中首先基于索科洛夫设计法对引射器进行结构设计与建模,然后开展了引射流体的流场分析,最后基于分析结果探究了引射性能的关键影响因素。结果表明,在不同压力工况下,引射系数与工作流体入口直径呈抛物线趋势,引射系数与引射流体入口直径正相关,引射系数随混合流体出口直径的增加呈现先增后减的趋势。基于上述影响规律对引射系数进行优化,可使引射器回氢性能提高13.55%,改善了燃料电池的氢气利用率,进一步完善了引射器结构优化与引射特性研究。
Fuel cell electric vehicles are an important development direction of new energy vehicles.As the core energy unit of the vehicle,fuel cell performance directly affects the economy,power and reliability of the vehicle.The ejector is an important functional element in the hydrogen circulation system of the fuel cell.Firstly,the ejector is designed and modeled based on the Sokolov design method.Then the flow field analysis of the ejector fluid is carried out.Finally,based on the analysis results,the key influencing factors of ejection performance are explored.The results show that under different pressure conditions,the ejection coefficient and the working fluid inlet diameter show a parabolic trend,and the ejection coefficient is positively correlated with the ejection fluid inlet diameter.The ejection coefficient first increases and then decreases with the increase of the mixed fluid outlet diameter.Based on the above-mentioned influence rules,the ejection coefficient is optimized,and the hydrogen return performance of the ejector is increased by 13.55%,which further improves the hydrogen utilization rate of the fuel cell,and further improves the ejector structure optimization and ejection characteristics research.
作者
赵海贺
陈泽宇
覃承富
郭晓冰
ZHAO Haihe;CHEN Zeyu;QIN Chengfu;GUO Xiaobing(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China)
出处
《电力工程技术》
北大核心
2022年第1期173-179,共7页
Electric Power Engineering Technology
基金
国家自然科学基金资助项目(51977029)。
关键词
新能源汽车
燃料电池
供氢系统
循环特性
引射器
计算流体动力学
new energy vehicles
fuel cell
hydrogen supply system
cycle characteristics
ejector
computational fluid dynamics
