In order to achieve a stable charge spray in a high humidity environment

we designed a premixed air-blast electrostatic nozzles and spray system by using the method of air ionization and liquid mist mixing. Particle image velocimetry（PIV） was used to measure the spray flow field of the nozzle at different gas-liquid ratios and different voltages. The velocity and vortices of the spray were analyzed under different conditions. The experimental results show that the maximum velocity of the spray flow field negligibly changes when the ratio of gas to liquid increases

but the high speed area increases in the spray flow field

and extends from the upper part of the flow field to the downstream. With the increase of gas liquid ratio

the turbulence degree of spray flow field is significantly improved

and the spray bundling property is gradually weakened

at the same time

more vortices with small scale and high dispersion are derived. With the increase of voltage

the disturbance degree of the spray flow field increases gradually

and the electric field has little effect on the flow field of the mainstream flow of the charged spray

but the disturbance degree to the edge of the liquid spray is obvious

which makes the streamline to become cluttered and produce more small scale vortices.