| 高压共轨喷射柴油机采用燃料主喷和后喷的燃烧模拟 |
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| 引用本文： | 刘忠长,金华玉,李康.高压共轨喷射柴油机采用燃料主喷和后喷的燃烧模拟[J].吉林大学学报(工学版),2008,38(6):1274-1280. |
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| 作者姓名： | 刘忠长 金华玉 李康 |
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| 作者单位： | 1. 吉林大学,汽车工程学院,长春,130022
2. 中国第一汽车集团公司,长春,130061 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 为了解后喷对柴油机燃烧、排放的作用,利用商用计算软件STAR-CD对高压共轨柴油机进行了改变后喷量和主后喷间隔的燃烧模拟。结果表明,后喷对NOx影响不大,碳烟显著降低。随着后喷量逐渐增大,碳烟曲线由单峰演变为双峰,且峰值明显降低,这是后喷燃油恰处于氧气较浓的区域着火燃烧,产生碳烟相对较少的结果。后喷扰动使得燃油和碳烟与氧气的混合加强,燃烧强化,高温区增大,后期碳烟氧化速率明显增大。主后喷间隔4°CA时25%后喷量的作用最明显,碳烟最终生成量减少37.6%。综合考虑热效率,认为后喷量取20%左右为宜。主后喷间隔过大时,碳烟有增加的趋势。
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| 关 键 词： | 动力机械工程 高压共轨喷射柴油机 后喷 燃烧模拟 |
| 收稿时间： | 2008-01-06 |
| 修稿时间： | 2008-03-06 |
Combustion simulation on common rail injection diesel engine with main and post fuel injection mode |
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| LIU Zhong-chang,JIN Hua-yu,LI Kang.Combustion simulation on common rail injection diesel engine with main and post fuel injection mode[J].Journal of Jilin University:Eng and Technol Ed,2008,38(6):1274-1280. |
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| Authors: | LIU Zhong-chang JIN Hua-yu LI Kang |
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| Affiliation: | 1.College of Automotive Engineering;Jilin University;Changchun 130022;China;2.China FAW Group Corporation;Changchun 130061;China |
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| Abstract: | To find out the effect of the post injection after the main injection on the combustion and exhaust emission of a common rail injection diesel engine,its combustion process was simulated with the commercial software STAR-CD under different post injection quantities and different dwells between the main and post injections.The results indicated that the post injection has little effect on NOx formation,but makes soot formation decrease remarkably.With the increase of post injection quantity,in-cylinder soot ... |
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| Keywords: | power machinery and engineering common rail injection diesel engine post injection combustion simulation |
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