| 管流中椭球形沉降微粒团受力模型及受力分析 |
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| 引用本文： | 黄迎,宁智,宋云超,付娟.管流中椭球形沉降微粒团受力模型及受力分析[J].机械工程学报,2011,47(18). |
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| 作者姓名： | 黄迎 宁智 宋云超 付娟 |
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| 作者单位： | 北京交通大学机电工程学院 北京100044 |
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| 基金项目： | 国家自然科学基金(50876007); 北京市自然科学基金(3102024)资助项目 |
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| 摘 要： | 沉降微粒再悬浮是柴油机排气微粒净化捕集及微粒采样过程中的一个重要现象。微粒团形态对沉降微粒团受力和再悬浮具有重要的影响。根据沉降微粒团再悬浮研究的需要,以管流中的柴油机排气沉降微粒为研究对象,在球形沉降微粒团再悬浮受力模型的基础上,结合椭球形微粒团的形态特征,建立椭球形沉降微粒团再悬浮静态受力模型;在此基础上,从微粒团再悬浮角度对椭球形沉降微粒团所受重力力矩、粘附力矩、碰撞力矩和曳力力矩进行分析,研究微粒团形态的变化对各作用力矩的影响。研究结果表明,微粒团形态对沉降微粒团受力具有重要影响。通过研究,得到微粒团形态变化对沉降微粒团所受力矩的影响规律。
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| 关 键 词： | 沉降微粒团 椭球形 再悬浮 力矩 模型 |
Force Models and Force Analysis of Ellipsoidal Deposited Particle Aggregates in the Pipe Flow |
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| HUANG Ying,NING Zhi,SONG Yunchao,FU Juan.Force Models and Force Analysis of Ellipsoidal Deposited Particle Aggregates in the Pipe Flow[J].Chinese Journal of Mechanical Engineering,2011,47(18). |
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| Authors: | HUANG Ying NING Zhi SONG Yunchao FU Juan |
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| Affiliation: | HUANG Ying NING Zhi SONG Yunchao FU Juan(College of Mechanical and Electrical Engineering,Beijing Jiaotong University,Beijing 100044) |
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| Abstract: | The reentrainment of the deposited particle aggregates is an important phenomenon in the process of trapping and sampling of diesel engine exhaust particles.The configuration of the deposited particle aggregates has important effect on the force acting on the aggregates and the reentrainment of the aggregates.The static force models of the ellipsoidal deposited particle aggregates are built up based on the models of the spherical aggregates and the characteristics of the ellipsoidal aggregates in order to s... |
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| Keywords: | Deposited particle aggregate Ellipsoid Reentrainment Force moment Model |
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