Abstract In order to fully understand the influence of needle-ring electrode configuration on the pro-perties of charged droplets in electro-spray, the software Ansoft Maxwell was taken as a tool, the diffe-rent needle-ring configurations were simulated, and the electrostatic distribution pattern can be achieved from the simulation results. Based on the simulation results, combined with the induction charging principle, we made some experiments on the influence of the electrode configuration on ato-mized droplets properties. The results show that the electric field intensity around the spray needle is the highest and decreases rapidly along the axial direction under all the spray needle-annular electrode configurations. The electric field intensity around the spray needle increases with the increase of charging voltage or the change of the relevant geometrical size of the electrode configurations. Among the electrode parameters investigated, when the spray needle length is 25 mm and the annular electrode thickness is 4 mm, the electric field intensity obtained is the highest and the induction charging effect is the best. The difference of relative position between the spray needle and the annular electrode will lead to a great difference in the direction of electric field, which will lead to different trajectories of droplets. The simulation results provide the design basis and theoretical basis for the rational configuration of electrode structure and the atomization effect of induction charged spray.
CHEN Qingping, HE Chao, JIN Hanhui.Experimental study on the effect of electrostatic spraying technology on gasoline combustion characteristics[J]. Laboratory research and exploration, 2013, 32(2):24-26(in Chinese)
CHEN Xiaopeng, CHENG Jiusheng, YIN Xiezhen. ele-ctrospinning research progress and application of electrohydrodynamic[J].Chinese science bulletin, 2003(7): 637-646.(in Chinese)
MASKI D, DURAIRAJ D. Effects of electrode voltage, liquid flow rate, and liquid properties on spray chargeability of an air-assisted electrostatic-induction spray-charging system[J]. Journal of electrostatics, 2010, 68(2): 152-158.(in Chinese)
LARYEA G N, NO S Y. Development of electrostatic pressure-swirl nozzle for agricultural applications[J]. Journal of electrostatics, 2003, 57(2):129-142.
WU Youjin, WU Yalei, XU Xiaohui, et al. Simulation of the aerosol of electrostatic spray of PZT sol solution[J]. Journal of University of Science and Technology of China, 2006, 36(7):755-760.(in Chinese)
刘彦娜. 静电雾化过程的理论分析与数值模拟[D]. 上海:东华大学, 2009.
DJAIRAM D. The electrostatic wind energy converter: electrical performance of a high voltage prototype[D]. 2008:43-73.
WANG Junfeng, WANG Ze, HUO Yuanping, et al. Effects of liquid properties on electrostatic spray characteristics[J].Journal of drainage and irrigation machinery engineering, 2012,30(4): 469-472.(in Chinese)