线-板型静电除尘器电场的三维数值算法

Three-dimensional Numerical Method for Calculating Electrical Field in the Wire-Plate Electrostatic Precipitator

由于静电除尘器电场的控制方程与流体力学具有相同的数学形式,所以将计算流体力学中的上风格式应用于正电晕条件下电流守恒方程,将相应的下风格式应用于负电晕情况。同时采用迭代的方式给出电晕线处电荷密度。数值结果表明,数值解与现有的实验结果吻合较好,证明了本方法的正确性。

Because the electrical equations in electrostatic precipitator are analogous to the equations used to describe fluid flow, the downwind scheme in computational fluid dynamics is introduced to solve the current continuity equation in the case of positive corona, and the relevant upwind scheme is applied in the case of negative corona. And the charge density near the corona wire is given by iteration. Numerical results show that the predicted value agrees well with the existing experimental data. Such a fact proves the validity of the current numerical method.