静电喷雾粒子场和沉积特性的数值模拟

Numerical Simulation of Particle Field and Deposition Characteristics of Electrospray

本文使用拉格朗日方法,研究了静电喷雾中荷电液滴流场和沉积特性,探讨了不同发射结构、加载电压对粒子速度、喷雾锥角、沉积形貌等参数的影响规律。通过分析不同结构下电场场强分布和粒子受力情况,分析了影响静电喷雾流场形状变化的主要作用机制。结果表明,采用双电极结构可以获得更小的喷雾锥角和更大的粒子平均速度;随着电极电势提高,粒子平均速度加快,喷雾锥角变小,相邻喷雾沉积图案会发生分离。

In this paper,the Lagrangian method is used to study the flow field and deposition characteristics of charged droplets in electrospray,and the influence of different emission structures and loading voltages on particle velocity,spray cone angle,deposition morphology and other parameters are discussed.By analyzing the distribution of electric field strength and the force of particles under different structures,the main action mechanism that affects the shape of the electrostatic spray flow field is analyzed.The results show that a smaller spray cone angle and a larger average particle velocity can be obtained by adopting a double electrode structure;as the electrode potential increases,the average particle velocity increases,the spray cone angle becomes smaller,and the adjacent spray deposition patterns will separate.