PEMFC系统引射器设计及仿真研究  

Design and numerical simulation of ejector in the proton exchange membrane fuel cell system

作　　者：杨秋香[1] 叶立[1] 殷园 童正明[1] YANG Qiuxiang;YE Li;YIN Yuan;TONG Zhengming(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;State Nuclear Power Engineering Company,Shanghai 200233,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]国核工程有限公司,上海200233

出　　处：《能源研究与信息》2018年第3期176-181,共6页Energy Research and Information

基　　金：上海理工大学科技发展项目(2018KJFZ179)

摘　　要：针对燃料电池汽车的运行特点,对氢气循环引射器进行了结构设计,利用Fluent软件对所设计的引射器进行了全工况模拟,确定了对引射器效率影响较大的变量。通过改变工作流体流量,并经过多次模拟后发现,为了使氢气引射器在怠速工况下不失效,引射器前端工作流体压力p_p要≥1.05 MPa。分析了工作流体质量流量G_p、喷嘴喉部直径d_(p*)和工作流体压力p_p对引射性能的影响,发现G_p对引射器的引射性能影响最大,并给出了G_p的取值范围。研究建议引射器设计时G_p在0.21~0.23 g·s^(-1)范围内最佳。Structure design of hydrogen circulation ejector in the fuel cell vehicle was conducted in terms of its operation characteristics. The numerical simulation of designed ejector was carried on using Fluent software under all conditions to confirmed the most influential factor on the ejector performance. By changing the flow rate of working fluid, it was found after multiple simulation that the working fluid pressure pp in the front end of ejector should be greater than or equal to 1.05 MPa to avoid the failure of ejector at idle speed. The influence of working fluid mass flow Gp, diameter at the nozzle throat section alp, and working fluid pressure pp on the ejector performance was investigated. It was found that the mass flow Gp had the greatest impact on the injection performance of the ejector. The optimal range of Gp was given. It recommended that the optimal Gp was in the range of 0.21 -0.23 g·s^-1 when designing the ejector.

关 键 词：质子交换膜燃料电池 引射器 数值模拟 工作流体质量流量 工作压力 

分 类 号：TK432[动力工程及工程热物理—动力机械及工程]