| 预喷射对增压柴油机高负荷燃烧和排放的影响 |
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| 引用本文： | 解方喜,洪伟,阎朝亮,韩立伟,赵靖华.预喷射对增压柴油机高负荷燃烧和排放的影响[J].燃烧科学与技术,2010,16(1). |
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| 作者姓名： | 解方喜 洪伟 阎朝亮 韩立伟 赵靖华 |
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| 作者单位： | 1. 吉林大学汽车动态模拟国家重点实验室,长春,130025
2. 吉林师范大学计算机学院,四平,136000 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 应用CFD模拟软件FIRE针对车用增压柴油机在高负荷工况下采用预喷射策略的缸内工作过程进行了数值计算,并分析了预喷射量和预/主间隔角对燃烧过程和排放的影响.研究结果表明,随预/主间隔角和预喷射量的增加燃烧始点提前,主喷燃油的燃烧速率加快,燃烧重心和终点提前,致使缸压峰值、放热率峰值和温度峰值均有所升高和前移;同时,对于NOx和碳烟,预喷射量和预/主喷射间隔角存在两个界限,在两个界限之内能获得较好的NOx和碳烟的折中关系,并且这两个界限与预喷射量和预/主喷射间隔角存在着一定的关系,当预喷射量和间隔角较小时碳烟生成量较高,而预喷射量和间隔角过大时NOx生成量急剧增加.
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| 关 键 词： | 增压柴油机 预喷射 燃烧 碳烟 数值模拟 |
Effect of Pilot Injections on Combustion and Emissions Under High Load of Turbocharged Vehicle Diesel Engine |
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| XIE Fang-xi,HONG Wei,YAN Chao-liang,HAN Li-wei,ZHAO Jing-hua.Effect of Pilot Injections on Combustion and Emissions Under High Load of Turbocharged Vehicle Diesel Engine[J].Journal of Combustion Science and Technology,2010,16(1). |
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| Authors: | XIE Fang-xi HONG Wei YAN Chao-liang HAN Li-wei ZHAO Jing-hua |
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| Affiliation: | XIE Fang-xi1,HONG Wei1,YAN Chao-liang1,HAN Li-wei1,ZHAO Jing-hua2 (1. State Key Laboratory of Automobile Dynamic Simulation,Jilin University,Changchun 130025,China,2. College of Computer Science,Jilin Normal University,Siping 136000,China) |
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| Abstract: | Numerical simulation of thermodynamic cycle and combustion in a turbocharged vehicle diesel engine using pilot injections under high load operations is carried out by means of a CFD tri-dimensional numerical analysis software FIRE. In this paper,the effects of pilot injection fuel quantity and interval between pilot and main injection on combustion process and exhaust emissions are discussed. The computed results indicate that start of ignition,combustion center and combustion terminal are advanced,and dura... |
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| Keywords: | NO_x turbocharged diesel engine pilot injection combustion NO_x soot numerical simulation |
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