Evaporation and Motion of Liquid Precursor Droplets in a Plasma Jet

To investigate the effect of spray parameter on the performance of the coating in solution plasma spraying,a model of the evaporation and motion of individual ceramic solution droplets in the plasma jet is presented in this paper.The influence of Stefan flow and the variable physical properties of droplets and environment gases are considered,the droplet motion and the heat and mass transfer of the droplet are simulated.The trajectory,temporal droplet surface temperature, as well as droplet radius variation are predicted.The effect of droplet size and injection velocity on droplet motion and evaporation are investigated.The results indicate that increasing the initial size or the injection velocity of the droplet in a certain range could enhance the heat and mass transfer between the droplet and the jet.