Numerical simulations of electrostatic precipitators featuring wire and spiked electrode designs were performed to determine particle behavior and separation efficiency. The applied-voltage mechanism that alters the flow structure of particles through ionic winds and mean electric fields are revealed. Numerical studies throughout the past years have shown these structures for channel and pipe configurations. However, less attention was given to field averaging for the n_i,∞t-product and electric field. Our study focuses on this averaging and illustrates relevant differences between multidimensional setups concerning these fields. Turbulence was modeled using the Reynolds-averaged Navier–Stokes equations with a second-order Reynolds-stress-model closure. A high three-dimensionality of the ionic wind-induced turbulence is presented. This leads to an increase in the submicron-particle precipitation rate. The results confirm the dependence of separation efficiency on particle density and permittivity, thereby showing the advantages of spiked wires compared with wire-plate setups used in electrostatic precipitators.

进行了具有电极和尖峰电极设计的静电除尘器的数值模拟，以确定颗粒行为和分离效率。揭示了通过离子风和平均电场改变粒子流动结构的外加电压机制。过去几年的数值研究表明，这些结构可用于通道和管道配置。然而，较少注意给予了场平均为ñ_我，∞ ŧ产品和电场。我们的研究集中于这种平均，并说明了涉及这些领域的多维设置之间的相关差异。使用具有二阶雷诺应力模型闭合的雷诺平均Navier-Stokes方程对湍流进行建模。提出了离子风致湍流的高三维度。这导致亚微米颗粒沉淀速率的增加。结果证实了分离效率对颗粒密度和介电常数的依赖性，从而显示了与静电除尘器中使用的线板装置相比，尖刺线的优势。