液滴喷射过程微熔滴充电的理论建模  

Modeling of Droplet Charging in Droplet Spray Process

作　　者：罗俊[1] 齐乐华[1] 杨方[1] 李莉[1] 蒋小珊[1] 

机构地区：[1]西北工业大学机电学院,陕西西安710072

出　　处：《航空学报》2007年第1期217-221,共5页Acta Aeronautica et Astronautica Sinica

基　　金：航天支撑基金;国防预研基金

摘　　要：为了精确分析微熔滴在静电场中的带电量,建立了微熔滴形成时的静电感应模型,并针对液滴相互静电力影响,提出了预测熔滴平均带电量的算法。对不同频率下的熔滴充电过程进行有限元建模计算,得到了不同频率下微熔滴带电量与充电电压的关系,可以预测微熔滴的平均带电量。计算结果与实际结果吻合良好,比现有理论方法更为接近实际结果。Exactly measuring droplet charging is the key to freeform fabrication by use of droplet spray. In this work, an electrostatic model of droplet charging is developed, and an algorithm for exactly predicting the charging on the droplet is presented, which reflects the electrostatic effects between droplets. The droplet charging model is solved in different conditions by finite element method （FEM）. The charging amount is predicted with the algorithm basing on the FEM results. The relationship between the charging voltage and the charging are established in different disturbance frequencies. The results of simulation agree well with those of experiment and prove to be superior to those reported in the literature.

关 键 词：熔滴 静电场 静电感应模型 充电 有限元 

分 类 号：V260.1[航空宇航科学与技术—航空宇航制造工程]