湖南大学学报（自然科学版）2016，Vol.43Issue(8)：8-15,8.
非对称喷嘴喷雾模拟网格适用性研究
Study of Grid Dependency of Spray Simulation on an Asymmetric-nozzle
摘要
Abstract
Spray simulation using Lagrangian-Droplet and Eulerian-Fluid (LDEF)method and the Discrete Drop-let Model (DDM)has been proved to be of grid dependency.The grid effects on the spray simulation of an asymmetric three-hole nozzle were studied.First,the sources of grid-dependency were analyzed.The effects of grid types and dif-ferent grid sizes of radial,azimuthal and axial directions on the spray process were investigated by comparing the spray shape and liquid penetration distance with experiment data.And the grid effect on the Sauter Mean Diameter (SMD) was studied.Finally,the aspect ratio between the radial and the axial directions of the grid was optimized.The result has shown that,for the asymmetric three-hole nozzle spray simulation,the polar mesh has better performance among the different mesh forms.With the decrease of the grid size on three directions,the spray tip penetration and SMD ba-sically present the tendency of increase,while the radial grid size shows greater influence than the axial size.The spray tip penetration fits best with experimental data when the grid size and the aspect ratio are optimized.关键词
喷雾特性/网格适用性/数值模拟/离散油滴模型/拉格朗日油滴-欧拉气体算法Key words
spray characteristic/grid dependency/numerical simulation/Discrete Droplet Model (DDM)/LDEF method分类
能源科技引用本文复制引用
杨小龙,张泽坪,陈征,徐光辉..非对称喷嘴喷雾模拟网格适用性研究[J].湖南大学学报（自然科学版）,2016,43(8):8-15,8.基金项目
国家自然科学基金资助项目（10502029），National Natural Science Foundation of China（10502029）；湖南省自然科学基金资助项目 （）
