测量油漆液滴粒径,速度及荷质比分布用于静电旋转钟喷雾模拟
High-speed electrostatic rotary bells are widely used in theautomotive industry as they provide high quality paint filmswith better transfer efficiency compared to air-atomizing guns.However, due to its highly turbulent spray pattern, transferefficiency is still not ideal, i.e. some portion of paint will notreach intended target surfaces and becomes overspray.Numerical simulation of the electrostatic spraying processprovides a tool to model this process as well as a way tooptimize transfer efficiency.Currently, the state-of-the-art simulation model cansimulate the flying trajectories of paint droplets from the edgeof the rotating bell cup to the target surfaces. It requires someinput information to start the simulation. The input informationincludes paint droplet size, velocity, and charge-to-mass ratio.Due to its large number of droplets, distributions based ondroplet diameters are used to represent the entire dropletpopulation.This paper describes experimental and mathematicalmethods to measure and calculate paint droplet size, velocity,and charge-to-mass ratio distributions. The resultinginformation can then be organized and used as the input datafiles for Electrostatic spray painting simulation.