The trajectories of charged powder particles in an electrostatic powder coating system were modeled considering electrical and fluid forces. The mathematical model employed an iterative technique wherein the charge simulation method was used to compute the electric field strength and the method of characteristics was used to compute the charge density in the gun-to-target region. The fluid flow between the electrostatic gun and the target was modeled using interpolated experimental data assuming stagnation point flow. Particle trajectories were simulated for size range 10-40 /spl mu/m and charge-to-mass ratios of -0.1 to -1 /spl mu/C/g. The simulation results showed good agreement with experimental data (charge and mass measurements) at several collection points on the painting target and provided valuable information concerning particle deposition.
展开▼
机译:考虑静电力和流体力对静电粉末涂料系统中带电粉末颗粒的轨迹进行建模。该数学模型采用了迭代技术,其中使用电荷模拟方法来计算电场强度,并使用特征方法来计算枪到目标区域中的电荷密度。静电枪和目标之间的流体流动是使用假定停滞点流动的插值实验数据进行建模的。模拟了尺寸范围为10-40 / spl mu / m和-0.1到-1 / spl mu / C / g的荷质比的粒子轨迹。仿真结果表明,在喷涂目标的几个收集点上,实验数据(电荷和质量测量)具有良好的一致性,并提供了有关颗粒沉积的有价值的信息。
展开▼