温度对静电除尘器内颗粒受力影响的数值模拟

doi:10.7523/j.issn.2095-6134.2017.02.008

中国科学院大学学报 ›› 2017, Vol. 34 ›› Issue (2): 172-178.DOI: 10.7523/j.issn.2095-6134.2017.02.008

温度对静电除尘器内颗粒受力影响的数值模拟

毕文剑, 李艳, 罗坤, 樊建人

浙江大学能源清洁利用国家重点实验室, 杭州 310027

收稿日期:2016-04-19 修回日期:2016-10-14 发布日期:2017-03-15
通讯作者: 罗坤,E-mail:zjulk@zju.edu.cn
基金资助:
环保部公益项目（201409008-4）和浙江省社会发展重大专项（2014C03025）资助

Numerical simulation of temperature effect on particle forces in electrostatic precipitators

BI Wenjian, LI Yan, LUO Kun, FAN Jianren

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Received:2016-04-19 Revised:2016-10-14 Published:2017-03-15

摘要/Abstract

摘要： 应用计算流体力学方法对高温下的线板式静电除尘器进行数值模拟，建立综合考虑温度场、电场、流场和颗粒动力场的多场耦合模型。采用有限体积法对计算域进行离散进而求解电场，采用欧拉-拉格朗日方法求解气固两相流动。研究温度对于静电除尘器内颗粒受力的影响。结果表明：随着温度的升高，颗粒所受的静电力减小而Saffman升力、布朗力和曳力均增大；曳力随温度的增加速率比静电力变化快，这可能是导致高温下除尘效率降低的原因。

关键词: 温度, 静电除尘, 电流体动力, 颗粒受力

Abstract: A computational fluid dynamics (CFD) model is proposed to describe the wire-plate electrostatic precipitator (ESP) in high temperature condition. In this model, the complex interactions among the electric field, temperature field, fluid dynamics, and the particulate flow are taken into account. The finite volume method is used to solve the electric field and the Euler-Lagrange model is used to describe particle-laden flows. The influences of high temperature on particle characteristics in ESP are investigated in the current simulation. Numerical results show that Coulomb force decreases while the Saffman lift force, Brownian force, and drag force increase with the temperature. Besides, the increasing rate of drag force is faster than that of Coulomb force, which may cause the reduced efficiencies at high temperature.

Key words: temperature, electrostatic precipitation, electro-hydrodynamic, particle force

中图分类号:

TK123

毕文剑, 李艳, 罗坤, 樊建人. 温度对静电除尘器内颗粒受力影响的数值模拟[J]. 中国科学院大学学报, 2017, 34(2): 172-178.

BI Wenjian, LI Yan, LUO Kun, FAN Jianren. Numerical simulation of temperature effect on particle forces in electrostatic precipitators[J]. , 2017, 34(2): 172-178.

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温度对静电除尘器内颗粒受力影响的数值模拟

Numerical simulation of temperature effect on particle forces in electrostatic precipitators

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