| 湍流燃烧的简化的联合PDF模拟 |
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| 引用本文： | 郭治民,张会强,王希麟,郭印诚,林文漪.湍流燃烧的简化的联合PDF模拟[J].清华大学学报(自然科学版),2001,41(8):75-78. |
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| 作者姓名： | 郭治民 张会强 王希麟 郭印诚 林文漪 |
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| 作者单位： | 清华大学工程力学系, |
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| 基金项目： | 美国华尔国际科学基金资助项目 |
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| 摘 要： | 为同时满足工程应用中的合理性和经济性 ,提出了一种简化的联合三维高斯分布的 PDF模型 ,将其用于后台阶突扩燃烧室中甲烷燃烧的数值模拟。由于充分考虑了组分浓度、温度的一阶矩以及它们的二阶自关联矩和互关联矩对化学反应速率的影响 ,得到的火焰形状和温度分布无论是定性还是定量上都比 EBU模型和 Arrhenius模型合理。因计算量较小 ,模型在工程实际中 ,特别是污染物生成的数值模拟中得到应用
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| 关 键 词： | PDF模型 突扩流动 湍流燃烧 |
| 文章编号： | 1000-0054(2001)08-0075-04 |
| 修稿时间： | 2000年6月7日 |
Numerical simulation of turbulent combustion using a presumed joint PDF model |
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| GUO Zhimin,ZHANG Huiqiang,WANG Xilin,GUO Yincheng,LIN Wenyi.Numerical simulation of turbulent combustion using a presumed joint PDF model[J].Journal of Tsinghua University(Science and Technology),2001,41(8):75-78. |
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| Authors: | GUO Zhimin ZHANG Huiqiang WANG Xilin GUO Yincheng LIN Wenyi |
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| Abstract: | The mean reaction rate in the frame of averaging approach is closed using the joint presumed PDF (possibility distribution function) model of turbulent combustion, in which the joint PDF of the reactant concentration and temperature is assumed to have a three dimensional Gaussian distribution. The model was verified by experimental data of premixed turbulent combustion of a sudden expansion flow. The results show that the joint PDF model is better than the Arrhenius and EBU models. Furthermore, it is suitable for most engineering applications since it is less expensive computationally, especially for the simulation of pollutant emissions. |
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| Keywords: | PDF model sudden expansion flow turbulent combustion |
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