摘要
为了研究低温环境下柴油机不同喷油参数(喷孔个数、喷油夹角、喷油提前角)对缸内燃烧和排放性能的影响,建立某型号直喷式柴油机三维模型,对低温环境下柴油机不同喷油参数进行燃烧模拟。结果表明:喷油参数会对喷油持续期、燃油空间分布、燃烧室底部凹坑内涡旋、燃油喷雾的穿透距离和扩散角度、燃油与空气混合时间和混合效果等方面产生作用,从而影响到柴油机的燃烧和排放性能;喷孔个数为8、喷油夹角为150°、喷油提前角为18℃A BTDC(上止点前)时,柴油机在低温环境下可获得最佳动力性。研究得到了低温环境下喷油参数对柴油机燃烧和排放的影响机制,可为低温环境下柴油机喷油参数的优化提供参考。
In order to study the impact of different injection parameters(number of injection holes,injection angle,injection advance angle)on the in-cylinder combustion and emission performance of diesel engine under low temperature environment,a three-dimensional model of a certain type of direct-injection diesel engine was established,and combustion simulation was carried out for different injection parameters of diesel engine under low temperature environment.The results show that the fuel injection parameters influence the fuel injection duration,the fuel spatial distribution,the swirl in the pit at the bottom of the combustion chamber,the penetration distance and diffusion angle of the fuel spray,the fuel-air mixing time and mixing effect,which will affect the combustion and emission performance of the diesel engine;The diesel engine can obtain the best power performance under low temperature environment when the number of injection holes is 8,the injection angle is 150°,and the injection advance angle is 18℃A BTDC(before top dead center).The mechanism of the influence of injection parameters on diesel engine combustion and emission under low temperature environment has been obtained,which provides some reference for the optimization of diesel engine injection parameters under low temperature environment.
作者
朱海荣
郭雪芳
邸智鹏
王钊
ZHU Hairong;GUO Xuefang;DI Zhipeng;WANG Zhao(School of Mechanical Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Hebei Tuopu Machinery Electric Company Limited,Shijiazhuang,Hebei 050018,China)
出处
《河北科技大学学报》
北大核心
2025年第4期355-365,共11页
Journal of Hebei University of Science and Technology
基金
国家自然科学基金(52406087)
教育部“春晖计划”合作科研项目(HZKY20220237)
河北省自然科学基金(E202208009)。
关键词
内燃机工程
柴油机
喷油参数
燃烧模拟
低温环境
internal combustion engine engineering
diesel engine
fuel injection parameters
combustion simulation
low temperature environment
