The trajectories of charged powder particles in an electrostatic powder coating system were modelled 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 modelled 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 0.1-1 (-)/spl mu/C/gram. 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:考虑电气和流体力,建模静电粉末涂料系统中带电粉末颗粒的轨迹。数学模型采用了一种迭代技术,其中使用电荷模拟方法来计算电场强度,并且使用特性方法来计算枪对目标区域中的电荷密度。使用假设停滞点流动的内插实验数据,建模静电喷枪和靶之间的流体流动。模拟粒子轨迹的尺寸范围为10-40 / SPL mu / m和0.1-1( - )/ spl mu / c /克的电荷质量比。仿真结果表明,在涂装目标上的几个收集点处与实验数据(电荷和质量测量)显示出良好的一致性,并提供了有关粒子沉积的有价值的信息。
展开▼