喷水技术对氢燃料发动机爆震的影响研究  

Influence of Water Injection on Knock of Hydrogen Engine

作　　者：唐小康 刘勇翔 刘非凡 余文龙 罗明江 陈子铭 李瑞娜[1] Tang Xiao-kang;Liu Yong-xiang;Liu Fei-fan;Yu Wen-long;Luo Ming-jiang;Chen Zi-ming;Li Rui-na(School of Automotive and Traffic Engineering,Jiangsu University,Jiangsu Zhenjiang 212000)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212000

出　　处：《内燃机与配件》2024年第17期1-3,共3页Internal Combustion Engine & Parts

基　　金：江苏省高等学校大学生创新创业训练计划省级一般项目(202310299157Y);江苏大学学生科研立项(22A275,22A284,22A303)。

摘　　要：氢气具有点火能量低、着火界限宽的特性,容易产生爆震等异常燃烧现象,进气道喷水是解决发动机爆震的有效手段。在CFD软件CONVERGE中针对缸径92mm的GDI氢燃料发动机模型,在进气道分别喷入10mg、20mg的水,分析发动机的燃烧特性和爆震指数。结果表明,10mg、20mg工况下,在上止点附近,缸内压力抖动幅度不断减小,缸温过渡更加平顺,放热率峰值从两个减少为一个;爆震评价参数MAPO分别从0.186MPa下降至0.038MPa、0.006MPa,表明喷水技术能有效抑制氢燃料发动机爆震。Hydrogen has characteristics such as low ignition energy and a wide ignition limit,making it prone to abnormal combustion phenomena such as detonation.Injecting water into the intake manifold is an effective means to mitigate engine knock.Using CONVERGE software,a model of a hydrogen fuel direct injection(GDI)engine with a cylinder diameter of 92mm was analyzed.Water was injected into the intake manifold at rates of 10mg and 20mg,and the combustion characteristics and knock index of the engine were studied.The results indicate that under both 10mg and 20mg water injection conditions,near top dead center,the fluctuation in cylinder pressure decreases continuously,cylinder temperature transition becomes smoother,and the peak heat release rate reduce from two peaks to one.The knock evaluation parameter MAPO decreases from 0.186 MPa to 0.038MPa and 0.006MPa respectively under the two water injection conditions,demonstrating that water injection technology can effectively suppress knock in hydrogen-fueled engines.

关 键 词：氢燃料发动机 爆震 进气道喷水 MAPO 

分 类 号：U464.114[机械工程—车辆工程]