液滴演化及静电场下锥射流形成的数值模拟  

Numerical Simulation of Droplet and EHD Cone Jet Formation Process

作　　者：王军锋[1] 左子文[1] 霍元平[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《工程热物理学报》2013年第4期667-671,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51006047)

摘　　要：液滴的演化作为雾化的最基本形式,研究其动力学特性为深入探究静电雾化机理提供了重要的理论依据。静电雾化的重要形式之一是锥射流,研究其形成过程及电动力学特性对于探讨分析多股射流等其他复杂多相流具有重要意义。利用Level-set耦合VOF方法,在假设流体不可压缩并做平流运动的情况下,对单液滴生成过程以及静电场下锥射流的形成进行了数值模拟。模拟结果与实验结果较好吻合,验证了Level-set耦合VOF方法模拟两相流问题的有效性。同时分析了液滴生成过程及锥射流状态下的速度场等分布,为模拟多场耦合等复杂条件下的液滴二次雾化奠定了基础。Droplet formation process as the most elementary of atomization, investigated on the hydrodynamics of droplet has great significance for in-depth exploration of secondary atomization under complex conditions. As a particular EHD atomization form, studied the cone jet formation process and electrodynamic characteristics has a importance meaning in the further study of the multiple jets theory. Based on Level set coupled VOF method, simulates single droplet formation and EHD cone jet process on the assumption that fluid is incompressible and does laminar movement. Reasonable agreement with experimental results is observed. The velocity field are also predicted. The computational results shows the validity of Level set coupled VOF method to simulate two-phase flow problems, and lays the foundation of simulating drop breakup under multiphysics field coupling and other complex conditions.

关 键 词：Level-set方法 VOF方法 液滴形成 静电场 锥射流 

分 类 号：TK018[动力工程及工程热物理]