静电雾化锥射流模式下液锥形态的研究  

Study of Liquid Cone Shape in Electrostatic Atomization Cone-Jet Mode

作　　者：王晓英[1] 闻建龙[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《实验力学》2013年第3期347-351,共5页Journal of Experimental Mechanics

基　　金：江苏省科技厅自然科学基金(BK2009705);国家自然科学基金(51006047);江苏大学高级人才启动基金(09JDG068)资助

摘　　要：本文分析了静电雾化锥射流模式下液锥表面静电应力、表面张力应力分布特性,基于应力平衡建立了液锥力学模型,并对流量、荷电电压及针形喷嘴的内半径等参数对液锥结构形态的影响进行了预测。首先设计了针形喷嘴静电雾化实验装置,应用高速摄影技术观测了静电雾化的典型雾化模式和液锥形态演化特性。实验结果表明:锥射流雾化模式仅在一定的荷电电压范围内才会出现;针形喷嘴的流量增加,液锥锥角减小,液锥长度增长;随着荷电电压或针形喷嘴内半径的增加,液锥锥角增大,液锥长度缩短。实验结果与液锥力学模型的预测结果一致。Liquid cone surface electrostatic stress, surface tension stress distribution characteristics in electrostatic atomization cone-jet mode was analyzed; the liquid cone mechanical model was eatablished based on stress equilibrium, and the influence of parameters such as flow, charge voltage, needle- shaped nozzle inner radius on liquid cone structural shape was predicted. Firstly, electrostatic atomization experimental device with needle-shaped nozzle was designed. Applying high-speed photography technology, typical atomization modes and liquid cone shape evolution were observed. Exeperimental results show that cone jet atomization mode occurs only within a certain range of charge voltage. With the flow increase of needle-shaped nozzle, the cone angle of liquid cone decreses and its length prolongs~ with the charge voltage and needle-sheped nozzle inner radius increase, the cone angle of liquid cone becomes bigger and its gets shorter. Experimental results are consistent with the prediction based on liquid cone mechanical model.

关 键 词：液锥形态 荷电电压 锥射流 力学模型 

分 类 号：S499[农业科学—植物保护]