In this paper, three types of wire-plate electrostatic precipitators with expanded-shrunk spoilers (ESP-ESSs) were proposed. The influences of different geometric characteristics and arrangements of the expanded-shrunk spoilers (ESSs) on the electric field intensity, airflow field, particle trajectory, and collection efficiency were investigated by experiment and numerical simulation. The ESP-ESSs was compared with ESP with parallel plates (ESP-PP). The numerical results were relatively in agreement with the experimental data. The maximum error was 6.5%. The results showed that with the increase of the ESS height, the electric field intensity increased. The ESSs could generate low-velocity vortices contributing to extend the retention time of particles, which was conducive to particle collection. In general, the collection efficiency of the ESP-ESS was superior to the ESP-PP, but there was no advantage for fine particles at high inlet gas velocity and low applied voltage.

在本文中，提出了三种类型的带有膨胀收缩扰流板的线板静电除尘器（ESP-ESS）。通过实验和数值模拟研究了膨胀-收缩扰流板（ESS）的不同几何特征和布置对电场强度、气流场、粒子轨迹和收集效率的影响。ESP-ESS 与具有平行板的 ESP (ESP-PP) 进行了比较。数值结果与实验数据比较吻合。最大误差为 6.5%。结果表明，随着ESS高度的增加，电场强度增加。ESSs可以产生低速涡流，有助于延长颗粒的保留时间，有利于颗粒的收集。一般来说，