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| Study of liquid properties on electrostatic spray atomizing performance |
| XU Yanming, LIU Jianhe*, LI Xingguang |
| College of Mechanical and Electrical Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, China |
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Abstract Several spraying experiments were carried out by using different liquids under the same charging condition when the liquid flow rate and the charging voltage applied were controlled respectively by using flow valve and ring electrode in high voltage equipment in the paper. The influence of charge voltage and liquid physical properties on droplet size distribution was analyzed by PDA measurement system. Thus, the effect of physical properties on the electrostatic spray atomizing performance was clarified. The results showed that the intensity of the electric field around the nozzle increased with increasing voltage, and the charge on the droplets increased accordingly, eventually the rough droplets were nebulized into fine droplets. The conductivity of the solution is an important factor affecting droplet size. The larger the conductivity, the higher the electric field force around the spraying nozzle, and the smaller the size of the charged droplets. However, if the conductivity of the solution is smaller, the charging voltage will play a dominant role in the droplet size distribution. The viscosity and surface tension of solution have an inhibitory effect on liquid atomization. Under the same charging condition, the droplet size decreases with decreasing surface tension and viscosity.
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Received: 26 March 2018
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