单颗过氧化氢液滴的荷电特性研究

Study on Electrostatic Characteristics of Hydrogen Peroxide

过氧化氢作为新型绿色火箭推进剂的主要燃料组分之一,可使用静电雾化方式对其进行荷电破碎。通过平行电场对过氧化氢液滴施加电场,进行荷电化;采用数字图像处理方法对电场中单颗荷电液滴的质心进行标定,获得其下落的运动轨迹;再通过提取平行电场下液滴的横向位移计算液滴的荷质比。结果表明:电压在0~20 kV范围内升高时,液滴荷质比增加,并于20 kV时趋于饱和,荷质比达到峰值794.23×10-3 C/kg。22 kV之后,液滴荷电性能发生转变,荷质比下降。

Hydrogen peroxide, as one of the main components of new green rocket propellant, can be broken up by electrostatic atomization in practical application. A parallel electric field is applied to charge the hydrogen peroxide droplet. Digit imaging processing is used to mark the centroid of a single droplet in the electric field by calibration and get its falling trajectory. The charge-to-mass ratio can be calculated by lateral displacement of the droplet under the uniform electric field. The results demonstrate that the slope of charge-to-mass ratio enhances in elevated electric field voltage between 0 to 20 kV. It gradually saturates and reaches the peak of 794.23×10-3 C/kg at 20 kV. The electrification performance of droplet transfers after 22 kV, the charge-to-mass ratio decreases.