计算力学学报Issue(1)：136-141,6.DOI:10.7511/jslx201501023
气相中双液滴正碰过程数值模拟研究
Numerical simulation of head-on binary collision of droplets in gas phase environment
刘泽军 1张超 2武丽丽 1吴建军1
作者信息
- 1. 解放军信息工程大学 导航与空天目标工程学院，郑州 450001
- 2. 国防科学技术大学 航天科学与工程学院，长沙 410073
- 折叠
摘要
Abstract
The phenomena of droplet collision not only exist widely in the downstream region of ejection nozzles in the combustion chambers of power equipments,but also they will affect the atomization characteristics of fuel.In order to reveal the binary collision mechanism of droplets with equal diameters, the Navier-Stokes equations are firstly solved in the axisymmetric coordinates and the method of VOF (Volume of Fluid)is utilized to track the evolution disciplines of the gas-liquid free surface during the process of droplet collision.Then,veracity of the numerical models is validated with the experimental results of Qian.Effects of ambient pressure on different results (separation and coalescence)after drop-let bouncing are investigated,and effects of ambient pressure and Weber number on separation of two droplets after collision are also analyzed.Results show that states (separation and coalescence)of drop-lets after collision and rebound are determined by the pressure of gaseous film between droplets and gas-eous dynamic resistance together.Moreover,the separation process of two droplets after collision is inde-pendent of the ambient pressure,and the higher Weber number of droplets leads to more serious deform-ation.关键词
液滴/正碰/VOF 方法/数值模拟Key words
droplet/head-on collision/VOF method/numerical simulation分类
数理科学引用本文复制引用
刘泽军,张超,武丽丽,吴建军..气相中双液滴正碰过程数值模拟研究[J].计算力学学报,2015,(1):136-141,6.
