| 直喷式柴油机碳烟和NOx排放的数值模拟及试验 |
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| 引用本文： | 刘永峰,秦建军,裴普成.直喷式柴油机碳烟和NOx排放的数值模拟及试验[J].车用发动机,2005(6):42-45. |
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| 作者姓名： | 刘永峰 秦建军 裴普成 |
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| 作者单位： | 北京建筑工程学院机械电子工程系,北京,100044;清华大学国家汽车安全与节能重点试验室,北京,100084 |
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| 基金项目： | 北京市教委科技发展计划项目，北京建筑工程学院校科研和教改项目 |
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| 摘 要： | 为预测直喷式柴油机的碳烟和NOx排放,提出了新的小火焰计算模型———RIF模型。此模型是通过引入理想混合比分数空间坐标系,将通常坐标系下的组分方程转换到混合比分数空间坐标系下,得出新的组分扩散方程。将小火焰计算模型与流体动力学程序(KIVA-3V)相嵌套,增加并修改原有计算模块,将湍流喷雾运动和湍流燃烧运动有机分开,计算出直喷式柴油机湍流燃烧后生成的碳烟和NOx,最后通过试验验证了该计算模型。
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| 关 键 词： | 直喷式柴油机 湍流燃烧 数值模拟 CFD 混合比分数 |
| 文章编号： | 1001-2222(2005)06-0042-04 |
| 收稿时间： | 2005-06-13 |
| 修稿时间： | 2005-08-29 |
Numerical Simulation and Experiment for Soot and NOx Emission in Diesel Engine |
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| LIU Yong-feng,QIN Jian-jun,PEI Pu-cheng.Numerical Simulation and Experiment for Soot and NOx Emission in Diesel Engine[J].Vehicle Engine,2005(6):42-45. |
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| Authors: | LIU Yong-feng QIN Jian-jun PEI Pu-cheng |
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| Institution: | 1. Mechanical and Electrical Engineering Department, Beijing Institute of Civil Engineering and Architecture, Beijing 100044. China; 2. State Key Lab of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China |
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| Abstract: | The representative interactive flamelet(RIF) model is presented and used for three-dimensional simulation of pollution(soot and NO_x) for direct-injection diesel engine.The model is based on stoichiometric mixture fraction space,and a way of separating the numerical effort associated with the solution of the turbulent flow field from that of solving the chemistry is offered.The new species equations are carried out.The results from the species equation are developed and the probability density function(PDF) with the mixture fraction are got.Then the probability density function is put into the CFD-code(KIVA-3V) and the CFD-code(KIVA-3V) is modified for the RIF model.Furthermore the emissions(soot and NO_x) are calculated and compared with the experimental data.It gives a new way to predict the pollutants for direct-injection diesel engine. |
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| Keywords: | CFD |
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