| 缸内直喷汽油机喷油及燃烧过程三维数值模拟 |
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| 引用本文： | 冯帅,刘勇,张骞,王志勋. 缸内直喷汽油机喷油及燃烧过程三维数值模拟[J]. 车用发动机, 2012, 0(1): 14-18,22 |
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| 作者姓名： | 冯帅 刘勇 张骞 王志勋 |
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| 作者单位： | 南京航空航天大学能源与动力学院;中国北方发动机研究所;中北大学机电工程学院 |
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| 摘 要： | 对某直喷汽油机部分负荷时的进气、喷油、混合气形成及燃烧过程进行了数值模拟。分析了喷油正时对混合气分布、燃烧性能及排放性能的影响。模拟结果显示,在喷油开始时刻为480°曲轴转角时混合气分布比较理想,达到了分层稀燃的目标。生成物NO的主要来源是参与燃烧的空气中的氮,NO的生成随温度的提高而急剧增加;炭烟生成的条件是高温和缺氧,局部较浓混合气相对缺氧导致炭烟生成。
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| 关 键 词： | 汽油机 缸内直喷 燃油喷射 燃烧过程 喷油提前角 数值模拟 |
3D Numerical Simulation of Spray and Combustion Process for In-cylinder DI Gasoline Engine |
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| FENG Shuai,LIU Yong,ZHANG Qian,WANG Zhi-xun. 3D Numerical Simulation of Spray and Combustion Process for In-cylinder DI Gasoline Engine[J]. Vehicle Engine, 2012, 0(1): 14-18,22 |
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| Authors: | FENG Shuai LIU Yong ZHANG Qian WANG Zhi-xun |
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| Affiliation: | 1.College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;2.China North Engine Research Institute,Datong 037036,China;3.Mechanical and Electronic Engineering Institute,North University of China,Taiyuan 030051,China) |
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| Abstract: | The numerical simulations of intake,fuel injection,mixture formation and combustion process were carried out on a direct injection gasoline engine at partial loads.The influences of injection timing on mixture formation,combustion and emission performance were analyzed.The results show that desired stratified lean burn can be realized at 480 °CA.The resultant NO is mainly from the nitrogen of burning air,which increases with the increase of temperature.The soot forms under the conditions of high temperature and oxygen lack,especially in rich mixture. |
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| Keywords: | gasoline engine in-cylinder direct injection fuel injection combustion process fuel injection advance angle numerical simulation |
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