PIV experimental study on electrostatic spray of pressure-swirl atomizer with annular electrode

The middle-size electrostatic spray generated by pressure-swirl atomizer and annular electrode, which could be applied in inside-room disinfections, was investigated through PIV experiment. PIV was applied to measure the flow of charged atomized particles. The flow field of uncharged and charged spray was compared and the change of spray flow filed was analyzed under different charging voltage. The experiment results indicate that the spray angular of charged spray increased and the particles disperse apparently compared with conventional spray. The velocity of charged particles in spray core become higher and the motion of particles in the domain around the electrode appears almost different change law when the spray was charged. The flow description of the charged particles spray under different charging voltage was presented in this paper. The measurement and analyses presented a research base for the application of electrostatic spray of the pressuer-swirl atomizer with an annular electrode.