双流体荷电雾化的PDA实验  

Experiment of Twin-fluid Charged Spray by PDA

作　　者：王贞涛[1] 岑旗钢[1] 宋晓宁[1] 罗惕乾[1] 

机构地区：[1]江苏大学能源与动力工程学院

出　　处：《农业机械学报》2008年第10期80-84,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家高技术产业化示范工程资助项目(项目编号:发改高计(2003)2140号);江苏省高校自然科学基金资助项目(项目编号:03KJD4300064)

摘　　要：液体荷电雾化技术能够有效降低雾化的粘滞阻力,提高雾化效果,在雾滴形成后电场能减小雾滴表面张力,使雾滴产生二次雾化,进一步减小雾滴粒径,同时可以提高雾滴粒径尺度的均匀性。以空气、水为介质对自行设计的双流体雾化喷嘴进行了实验研究,获得了不同荷电电压与液气比下的雾滴粒径、雾滴轴向射流速度及雾滴的轴向湍流脉动强度,利用相关技术实现了对气液两相速度和湍流脉动强度的测定,探讨了荷电电压对雾滴粒径、轴向射流速度及湍流脉动强度的影响。The electrostatic charged spray could reduce the viscosity resistance and enhance the atomization effect. After the droplets come into being, the electric field can minish the droplets surface tension and make the droplets produce the second atomization, and further the droplets become much smaller and the uniformity of droplets diameter is improved. With the air and water as working fluids, the experimental research of twin-fluid charged spray nozzle designed by oneself was studied. The droplets diameter, the axial jet velocity and turbulent fluctuation intensity under the different charged voltages and gas-liquid ratio were obtained. The measure of two phases flow velocity and turbulent fluctuation intensity were determined. The influence of charged voltage and droplets diameter, axial jet velocity, turbulent fluctuation intensity were discussed.

关 键 词：荷电电压 雾滴粒径 雾滴速度 湍流脉动强度 PDA 

分 类 号：S499[农业科学—植物保护]