Study On Electrostatic Atomization Characteristics Of Hydrogen Peroxide

Hydrogen peroxide will not produce residual and harmful substances during decomposition.It is regarded as an ideal reagent for disinfection and sterilization.On the other hand,due to its high specific heat,high density,storability,low vapor pressure,low fuel ratio and other merits,it has become one of main fuel components of the new green rocket propellant.Because of the application in many fields,it has attracted wide attention from the outside world.It needs to be atomized to sterilize more thoroughly,distribute fuel better and combust more completely.The electrostatic atomization can achieve good atomization effect without specicial nozzles.From current literatures,there are few researches on the electrostatic atomization of hydrogen peroxide.Therefore,hydrogen peroxide was selected as the study subject and its physical properties are collected in detail.The study will focus on the effects of different voltages,needles’ diameters,rate of flow and solution concentration on electrostatic atomization characteristics.An electric field is applied to hydrogen peroxide droplets by a uniform parallel electric field and they are charged by inductive charging;the centroid of a single charged droplet in the electric field is calibrated by a digital image processing method to obtain a falling motion trajectory;The lateral displacement of the droplets under the parallel electric field is extracted to calculate the charge-to-mass ratio of the droplets.The result shows that during 0-18 kV,charge-to-mass ratio increases linearly when voltage increases.It gradually becomes saturated and the peak is 794.23×10-3 C/kg when voltage is around 20 kV.After reaching saturation after 22 kV,the droplet charge performance changes and the charge-to-mass ratio decreases.As a comparative experiment,different voltages,rate of flow,needles’diameters and solution concentration are carried out through a non-uniform needle-ring electric field in contact charging.Sizes and distributions of droplet are obtained by digital image processing.In the same experiment condition,better and more reasonable spray conditions of hydrogen peroxide breakup are obtained with data collection and processing.Finally,the breakup process and the breakup mechanism of hydrogen peroxide in non-uniform electric field is analyzed.Experimental results show that when the voltage is 28 kV,the flow rate is 500 ml/h.The inner diameter of the needle is 0.4 to 0.5 mm.35wt.%solution can atomize more droplets and the average particle size is around 90 μm.8wt.%solution’s average particle size is 67.39 μm.This is the minimum value among all the concentrations.