| 管流中沉降微粒团再悬浮控制因素分析 |
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| 引用本文： | 黄迎,宁智,宋云超,付娟.管流中沉降微粒团再悬浮控制因素分析[J].内燃机学报,2012(1):42-48. |
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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 |
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| 基金项目： | 国家自然科学基金资助项目(50876007);北京市自然科学基金资助项目(3102024);中央高校基本科研业务费专项资金资助项目(KMJB11055536) |
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| 摘 要： | 沉降微粒再悬浮受微粒团直径、气流速度、微粒团与壁面间的黏附状况以及管道情况等多种因素的作用,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.以管流中的柴油机排气沉降微粒为研究对象,利用建立的沉降微粒团再悬浮静态受力模型,对管流中沉降微粒团再悬浮的控制因素进行了分析.研究结果表明,微粒团黏附角、平均流速以及管径等因素对管流中沉降微粒团的再悬浮具有重要的影响.通过研究,得到了微粒团黏附角、平均流速以及管径等控制因素对管流中沉降微粒团再悬浮的影响规律.
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| 关 键 词： | 柴油机 微粒 再悬浮 黏附角 平均流速 |
Analysis on Controlling Factors of Deposited Particle Reentrainment in the Pipe Flow |
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| HUANG Ying,NING Zhi,SONG Yun-chao,FU Juan.Analysis on Controlling Factors of Deposited Particle Reentrainment in the Pipe Flow[J].Transactions of Csice,2012(1):42-48. |
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| Authors: | HUANG Ying NING Zhi SONG Yun-chao FU Juan |
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| Affiliation: | (College of Mechanical and Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | Particle deposit and reentrainment are important phenomena in the process of trapping and sampling of diesel engine exhaust particles,and is influenced by multiple factors,such as particle diameter,gas velocity,particle adhesion state on wall,pipe circumstance,et al.The controlling factors of particle reentrainment in the pipe flow were analyzed based on the static models of particle reentrainment.Calculation results show that the adhesion angle,average flow velocity and tube diameter have large effect on the reentrainment of diesel engine exhaust particles in the pipe flow.The influence of adhesion angle,average flow velocity and tube diameter on the reentrainment of diesel engine exhaust particles in the pipe flow was understood through the analysis. |
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| Keywords: | diesel engine particle reentrainment adhesion angle average flow velocity |
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