The Research On The Motion And Deposition Characteristic Of Charged Droplet

The elementary theory of the charged droplet's move-motional and depositional process has been researched. And an electrostatic pressure atomized nozzle's move-motional and depositional characteristic has been studied by experiments. Three alterable experimental parameters were chosen: liquid pressure, flux and electrostatic voltage. The subject is from the program of high voltage electrostatic spray locust-control vehicle industrialization demonstration project, which is ratified by the National Development and Reform Commission.1. At the research on the elementary theory of the atomization process and electrostatic field and the charged two-phase flow which have the influence on the charged droplet's move-motional and depositional process, the elementary theory of the electrostatic spraying technique has been studied by the stress analysis of the charged droplet in the move-motional and depositional process.2. The electrostatic pressure atomized nozzle were designed, and it's move-motional and depositional characteristic were measured and the particle deposition distributing in charging condition is compared with un-charging condition to discuss the effect of air-dynamical and electrostatic force to the droplet's move-motional and depositional process. Conclusions from the experiments:(1) The particle diameter will become smaller and it's distributing will become more uniformity as the liquid pressure, flux and electrostatic voltage increasing. Electrostatic force can change the effect of liquid pressure and flux to particle diameter.(2 ) The deposition atomization angle in charging condition is much more larger than in un-charging condition, but in charging condition deposition atomization angle won't become bigger as the electrostatic voltage increasing; in un-charging condition the deposition atomization angle will become bigger as the liquid pressure and flux increasing and won't in charging condition.(3) Depositional area and effective depositional area will increase as the liquid pressure, flux and electrostatic voltage increasing, especially the increasing of the electrostatic voltage. It can make an obvious increasing on depositional area and effective depositional area.(4) The density of deposited droplets will become less uniformity as the liquidpressure, flux and electrostatic voltage increasing: the liquid pressure has the least effect, and flux follows it and electrostatic voltage has the biggest one.