The aim of this work is to investigate the effects of magnetic field and ionic wind on the ability of a wire-plate electrostatic precipitator (ESP) to trap fine particles. A theoretical model of multi-field coupling between gas flow field, particle dynamic field and electromagnetic field was established, and a grid model was built by GAMBIT software. The collection efficiency under different gas velocities was calculated in FLUENT software where the electric field force and the magnetic field force were introduced by User Defined Function (UDF). The numerical results indicate that both ionic wind and applied magnetic field can effectively improve the PM2.5 collection efficiency in a wire-plate ESP, and the smaller the particle size, the more obvious the improving effects are. With the increase of gas velocity, PM2.5 collection efficiency has a nonlinear declining trend, but the contribution of ionic wind or magnetic field to the collection efficiency increases. The trapping performance of the wire-plate ESP under the combined action of the two factors is better than that of considering one of them separately. The research results can open up a new design idea and direction for the performance upgrading of the wire-plate ESP.

这项工作的目的是研究磁场和离子风对线板静电除尘器 (ESP) 捕获细颗粒的能力的影响。气体流场、粒子动态场和电磁场多场耦合的理论模型建立网格模型，并通过 GAMBIT 软件建立网格模型。在FLUENT软件中计算不同气体速度下的收集效率，其中电场力和磁场力由用户定义函数（UDF）引入。数值结果表明，离子风和外加磁场均能有效提高线板静电除尘器中PM2.5的收集效率，且粒径越小，改善效果越明显。随着气速的增加，PM2.5的收集效率呈非线性下降趋势，但离子风或磁场对收集效率的贡献增加。两种因素共同作用下的线板静电除尘器的捕集性能优于单独考虑其中之一的捕集性能。