| 激光诱导炽光技术测试过程的数值模拟 |
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| 引用本文： | 何旭,李红梅,郑亮,齐运亮,王建昕.激光诱导炽光技术测试过程的数值模拟[J].北京理工大学学报,2012,32(10):1048-1053. |
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| 作者姓名： | 何旭 李红梅 郑亮 齐运亮 王建昕 |
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| 作者单位： | 北京理工大学机械与车辆学院,北京,100081;清华大学汽车安全与节能国家重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目(50806039);北京理工大学优秀青年教师资助计划(2011YR0306) |
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| 摘 要： | 建立了激光诱导炽光技术测试过程的数学模型,对激光加热过程中碳烟粒子的粒径和温度的变化进行计算,并基于模型重点考察了入射激光波长、入射激光能量密度及初始粒径对碳烟粒子加热过程的影响.结果表明,入射激光波长选择532 nm是比较好的选择,激光能量密度对激光诱导炽光技术的测试过程的影响很大,可以利用温度衰减速率推断碳烟粒子的初始粒径;该数学模型的建立及数值模拟表明运用激光诱导炽光技术可以推断碳烟初始粒径.
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| 关 键 词： | 激光诱导炽光 碳烟 粒径 |
| 收稿时间： | 2011/9/20 0:00:00 |
Numerical Simulation of the Process of Laser Induced Incandescence |
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| HE Xu,LI Hong-mei,ZHENG Liang,QI Yun-liang and WANG Jian-xin.Numerical Simulation of the Process of Laser Induced Incandescence[J].Journal of Beijing Institute of Technology(Natural Science Edition),2012,32(10):1048-1053. |
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| Authors: | HE Xu LI Hong-mei ZHENG Liang QI Yun-liang and WANG Jian-xin |
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| Institution: | School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China |
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| Abstract: | The model of laser induced incandescence(LII) technique is established in this research. It plays an essential role in inferring the primary soot particle size. The variations of the particle size and temperature during heating process were calculated. The effects of factors, such as laser wavelength, laser fluence and initial diameter of the particles, on the heating process were then investigated. It was found that, the laser wavelength of 532 nm was to be a better choice, the laser fluence had a significant effect on the process and the particle temperature decay rate could be used to infer the primary particle size. The presented model and simulation results would be very useful for applications of LII to deduce soot particle size. |
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| Keywords: | laser induced incandescence soot particles size |
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