摘要
用三维离散涡丝方法模拟轴对称圆射流场涡结构的发展·所得结果在某个周向位置上与用二维点涡方法计算的结果符合较好·然后采用单向耦合模型模拟固粒在圆射流中的运动，说明当固粒Ｓｔ数远小于１时，固粒受流场的作用较明显，当Ｓｔ数为１时，固粒主要分布在涡结构的周围，分布较均匀；当Ｓｔ数远大于１时，固粒受流场的影响较弱·当对涡环沿周向施以五个波长的扰动时，固粒扩散的范围较宽·固粒的扩散与扰动的振幅成正比·文中所得结论与一些实验结果相符。
In this paper, the three_dimensional vortex filament method was used to simulate the evolution of vortex structures in the axisymmetric round jet. The results agree well with the ones given by Chung and Troutt. Then one_coupling model was employed to calculate the particle motion based on the computed flows. The results show that the particle motion is affected by flows obviously at the case of particle number St1 and negligibly at St1 ,particles distribute around the vortex structures uniformly at St～1 . When perturbations with wavenumber 5 are introduced to vortex rings, particles disperse wider along radial direction, which conforms to the experimental results. The degree of particle dispersion is in the direct ratio to the amplitude of perturbation. The conclusions given in the paper are useful to the practice usage.
出处
《应用数学和力学》
EI
CSCD
北大核心
1999年第5期470-476,共7页
Applied Mathematics and Mechanics
基金
浙江省自然科学基金青年科技人才专项培养资金资助项目
关键词
气固两相流
圆射流
大涡结构
固粒扩散
涡结构
gas particle two_phase flow
round jet
large vortex stucture
particle dispersion
