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采用金属网笼法对静电雾化中雾滴群的空间电荷密度进行了实验测试,结果表明该方法可以大致了解雾化空间中雾滴群的局部带电情况。实验数据进一步表明,荷电雾滴的带电特性在不同空间位置处有极大的差异性,雾化轴心处的雾滴电荷密度最高,雾滴电荷密度沿径向方向逐渐减小。当施加电压增大时,不同空间位置处的雾滴电荷密度均有所提高,但电荷密度沿径向变化有所变缓,径向分布逐渐增宽。随着距毛细管距离增大,所有径向位置处的电荷密度均有不同程度降低。
The metal net cage method was used to test the space charge density of the fog drop group in electrostatic atomization. The results show that this method can get a general understanding of the local charging situation of the fog drop group in atomizing space. The experimental data further show that the charging characteristics of the charged droplets are greatly different at different spatial positions, the highest atom density of the droplets at the atomization axis and the decrease of the charge density of the droplets along the radial direction. When the applied voltage is increased, the charge densities of the droplets in different spatial positions are increased, but the charge density changes slowly along the radial direction, and the radial distribution broadens gradually. As the distance from the capillary increases, the charge density at all radial locations decreases to some extent.