Influence of electrode structure on electrofluid motion

doi:10.3969/j.issn.1000-1565.2023.03.004

Abstract

Abstract: In order to study the influence of electrode structure change on the flow field and electric field distribution of dust collector after the secondary current generated by corona discharge is coupled with the primary current, the pole matching mode of wire traditional plate and wire perforated plate with two different structures is designed. On the basis of establishing the multi physical field coupling numerical model of corona discharge and flow field, the characteristics of electric field and flow field in the channel of electrostatic precipitator under three different pole matching modes are simulated and studied by COMSOL software. The simulation results show that the electrode structure has a great influence on the distribution of electric field and flow field near the plate in the dust collector. The near plate electric field intensity of the new perforated plate is higher than that of the traditional plate. With the increase of inlet velocity, the disturbance of ion wind on the flow field in the dust collector channel gradually decreases. The results also show that the orifice structure can effectively reduce the velocity near the dust collector plate. When the- DOI:10.3969/j.issn.1000-1565.2023.03.004电极结构对电流体运动的影响武磊,郭朋朋,陈旭东, 李庆(河北大学物理科学与技术学院,河北保定 071002)摘要:为了研究电极结构的变化对除尘器中电晕放电产生的二次流与主流一次流耦合后形成的流场以及电场分布的影响,设计了线-传统板与2种不同结构的线-开孔板极配方式.在建立电晕放电和流场的多物理场耦合数值模型的基础上,利用COMSOL软件模拟研究了3种不同极配方式下的电除尘器通道内的电场与流场特征.模拟结果表明:电极结构对除尘器内部近板电场及流场分布影响较大.新型开孔板的近板电场强度高于传统板,随着入口流速的增大,离子风对除尘器通道内流场的扰动逐渐减小.结果同时表明孔结构能有效降低近收尘极板流速,在入口流速为0.5 m/s时,新型开孔板近板风速相比传统板分别降低了14.58%和15.62%,入口流速为1.0 m/s时,近板流速分别降低了19.94%和20.20%.这一结果表明新型开孔结构能有效减小收尘极板附近流速,减少二次扬尘,提高除尘效率.关键词:电晕放电;静电除尘;电极结构;离子风;数值模拟中图分类号:X513 文献标志码:A 文章编号:1000-1565(2023)03-0248-09Influence of electrode structure on electrofluid motionWU Lei, GUO Pengpeng, CHEN Xudong, LI Qing(College of Physics Science and Technology, Hebei University, Baoding 071002,China)Abstract: In order to study the influence of electrode structure change on the flow field and electric field distribution of dust collector after the secondary current generated by corona discharge is coupled with the primary current, the pole matching mode of wire traditional plate and wire perforated plate with two different structures is designed. On the basis of establishing the multi physical field coupling numerical model of corona discharge and flow field, the characteristics of electric field and flow field in the channel of electrostatic precipitator under three different pole matching modes are simulated and studied by COMSOL software. The simulation results show that the electrode structure has a great influence on the distribution of electric field and flow field near the plate in the dust collector. The near plate electric field intensity of the new perforated plate is higher than that of the traditional plate. With the increase of inlet velocity, the disturbance of ion wind on the flow field in the dust collector channel gradually decreases. The results also show that the orifice structure can effectively reduce the velocity near the dust collector plate. When the- 收稿日期:2022-08-25 基金项目:国家自然科学基金资助项目(51777051);河北省高等学校科学技术研究项目(ZD2020197);河北省自然科学基金资助项目(E2022201057;E2021201037;G2020201001) 第一作者:武磊(1997—),男,湖北荆州人,河北大学在读硕士研究生,主要从事大气污染监测与控制方面研究.E-mail:wuleistone123@163.com 通信作者:李庆(1968—),男,安徽合肥人,河北大学研究员,博士生导师,主要从事高电压技术的应用与大气污染控制技术的开发与应用.E-mail:liqinghbu@126.com第3期武磊等:电极结构对电流体运动的影响inlet velocity is 0.5 m/s, the velocity near the plate of the new orifice plate is reduced by 14.58% and 15.62%, respectively, compared with the traditional plate. When the inlet velocity is 1.0 m/s, the velocity near the plate is reduced by 19.94% and 20.20% respectively. The results show that the new opening structure can effectively reduce the flow velocity near the dust collector plate, reduce the secondary dust, and improve the dust removal efficiency.

Key words: corona discharge, electrostatic precipitator, electrode structure, ion wind, numerical simulation

CLC Number:

X513

WU Lei, GUO Pengpeng, CHEN Xudong, LI Qing. Influence of electrode structure on electrofluid motion[J]. Journal of Hebei University(Natural Science Edition), 2023, 43(3): 248-256.

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