Numerical study on characteristics of particle depositon with rough surfaces

被引：0

作者：

Hong W. ^{[1
]}

Qi Q. ^{[1
]}

机构：

[1] School of Energy and Power Engineering, Northeast Dianli University, Jilin, 132012, Jilin Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2016年 / 36卷

关键词：

Atmospheric particulates; Gas-solid two phase flow; Numerical simulation; Particle deposition; Rib-roughened surfaces;

D O I：

10.13334/j.0258-8013.pcsee.160975

中图分类号：

学科分类号：

摘要：

Eulerian-Lagrangian method was applied to simulate the characteristics of particle deposition on smooth surfaces and rib-roughened surfaces. Particle deposition velocity and particle deposition efficiency at various position under different cases (air flow velocity range of 3~7m/s, particle diameter range of 3~40μm) were analyzed. The results indicated that the boundary layer is shifted by a distance away from the wall at rough elements, the capture and entrainment effect of vortex is enhanced. Wind-ward sides are the main deposition surfaces, deposition efficiency increases with the increase of particle diameter and the decrease of flow velocity. Bottom clearances are the minor deposition surfaces, deposition efficiency decreases with the increase of flow velocity, the maximum bottom clearance deposition efficiency appear when the particle diameter was 10μm. Rough elements accelerate particle deposition velocity, which increase with dimensionless particle relaxation time on smooth and rough surfaces. © 2016 Chin. Soc. for Elec. Eng.

引用

页码：147 / 153

页数：6

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