多堆共轨燃料电池脉冲阀引射器仿真分析  

The Simulation Analysis of Pulse Valve Ejector for Multi-Stack Common-Rail Fuel Cell

作　　者：张蒙蒙 陈海娥 邓阳庆 Zhang Mengmeng;Chen Haie;Deng Yangqing(Foshan Xianhu Laboratory,Foshan 528200)

机构地区：[1]佛山仙湖实验室,佛山528200

出　　处：《汽车工程师》2023年第10期11-16,共6页Automotive Engineer

摘　　要：基于某峰值功率为200 kW的大功率三堆共轨质子交换膜氢燃料电池(PEMFC),使用Fluent软件对脉冲阀引射器单体和供氢系统的多缸共轨脉冲阀引射器进行稳态计算流体力学(CFD)迭代计算,确定引射器方案,利用引射器台架试验验证了设计方案和仿真模型的可靠性,对脉冲阀引射器引射系数的影响因素进行仿真分析,可知同等压力变化条件下,二次流喷射压力对引射系数的影响最大,入堆压力次之,喷射压力影响最小,同时,氮气含量对引射系数影响较大,最后进行脉冲阀引射器瞬态仿真分析,结果表明:同稳态结果相比较,瞬态条件下计算的引射系数有很大的裕度,因此在电堆实际工作时可以进一步覆盖低功率工况;保持脉冲阀占空比不变,提高喷射频率,有利于引射系数的提高。Based on a 200 kW peak power three-stack common-rail Proton Exchange Membrane Fuel Cell(PEMFC),the steady Computational Fluid Dynamics(CFD)iterative calculation between the single pulse valve ejector and the multi stack common-rail pulse valve ejector under and hydrogen supply system was carried out by Fluent software,and the ejector scheme was determined.Then the reliability of the design and simulation was verified by the ejector bench test.The influence factors of pulse valve ejector were simulated and analyzed,from which we can know that with the same pressure variation,the injection pressure of secondary flow has the greatest influence on the ejection coefficient,followed by the inlet pressure,and the injection pressure has the least influence.Meanwhile,nitrogen content has great influence on the ejection coefficient.Finally,the transient simulation analysis of the pulse valve ejector was carried out.The results show that,compared with the steady state results,the ejection coefficient calculated under transient state has a large margin,so it can further cover the low power condition.Keeping the duty cycle unchanged and increasing injection frequency are beneficial to the improvement of ejection coefficient.

关 键 词：氢燃料电池 多堆共轨 脉冲阀引射器 均匀性 计算流体力学分析 

分 类 号：TK91[动力工程及工程热物理]