颗粒物在低温等离子体中荷电模型对比.doc

文档介绍：
颗粒物在低温等离子体中荷电模型对比#
钱中1,杨帆2*
(1. 常州大学石油工程学院,常州 213016;
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2. 上海理工大学能源与动力工程学院,上海 200093)
摘要:以颗粒物在低温等离子体中的荷电过程为研究对象,分析了球电容、粒—壁作用及蒙
特卡罗三种经验模型在预测颗粒物荷电量中的应用,并将预测值与实测值进行了对比。研究
表明,对于微细颗粒,预测模型均存在一定误差,预测电量通常偏大。球电容模型和蒙特卡
罗模型仅适用于半径 7 μm 以上的较大颗粒,且此时三种预测模型趋于一致,且与实测值
基本一致。而球—壁模型,对于颗粒半径在 2~3 μm 时能给出较准确的预测值。此外,颗
粒所荷电量与等离子体放电功率关系不大。需建立更精确的荷电模型以准确估算颗粒物的荷
电量。
关键词:颗粒荷电;球电容;粒—壁作用;蒙特卡罗
中图分类号:O53
parison of charging models of particulates in the low
temperature plasma
QIAN Zhong1, YANG Fan2
(1. School of Petroleum Engineering, Changzhou University, 213016;
2. School of Energy & Power Engineering, University of Shanghai for Science & Technology,
Shanghai 200093)
Abstract: The research object of this paper is charging process of particulates in the
low-temperature plasma. Three empirical models employed for predicting the charges of a particle,
. capacitor, particle-wall interaction, and Monte-Carlo simulation are analyzed and employed to
predict the charge number. Also the predicted values pared with the measured data. The
results indicate that these three models give the larger values for fine particles and certain errors
are found. The capacitor model and Monte-Carlo model are only applicable to a larger particulate
with a radius than 7 μm. Furthermore, in this case, three predictive models tend to be consistent
and their predictions are agreed wit