摘要：为了提高射流液体的雾化效果,在分析荷电作用下两相湍流数学模型的基础上,采用粒子图像测速(particle image velocimetry,PIV)技术优化影响静电喷嘴雾化能力的主要参数(液体压力和充电电压)。结果表明:随着液体压力的增大,喷雾粒度表现出明显的单调减小的变化规律;液滴雾化粒度在充电电压10~20 k V之间是变化较大;随着充电电压的增大,雾化角呈现先增大后减小的趋势。通过因素水平综合分析确定液体压力为4 MPa和充电电压在10~25 k V之间对静电雾化喷嘴的雾化效果是最有利的。

关键词：静电喷嘴；雾化特性；粒子图像测速技术；参数优化

Abstract：In order to improve the atomization effect of liquid jet,on the basis of mathematical mode that analyzed under the action of charged two phase turbulent flow, the main parameters of electrostatic nozzle(charging voltage and liquid pressure) that affect the optimization ability is optimized by using particle image velocimetry(PIV). The results show that the spray particle size shows obvious change laws of monotone decreasing with the increase of liquid pressure. The droplets atomized particle size in the charging voltage is between 10 to 20 k V. With the increase of charging voltage, atomizing angle shows a trend of decrease after the first increase. Further by factor level comprehensive analysis to determine the liquid pressure of 4 MPa and charging voltage between 10 to 25 k V of electrostatic atomization nozzle atomizing effect is optimum.

Keywords: electrostatic spray nozzle；atomization characteristics；particle image velocimetry technology；parameter optimization