On coherent structures in a three-dimensional transitional plane jet
On coherent structures in a three-dimensional transitional plane jet作者机构:State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China
出 版 物:《Science China(Technological Sciences)》 (中国科学(技术科学英文版))
年 卷 期:2008年第51卷第4期
页 面:386-396页
核心收录:
学科分类:0810[工学-信息与通信工程] 080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0702[理学-物理学] 0812[工学-计算机科学与技术(可授工学、理学学位)] 0801[工学-力学(可授工学、理学学位)]
基 金:Supported by the National Natural Science Foundation of China (Grant No. 50506027)
主 题:coherent structures three-dimensional plane jet direct numerical simulation finite volume method interactions
摘 要:Direct numerical simulation of coherent structures in the three-dimensional transitional jet with a moderate Reynolds number of 5000 was conducted. The finite volume method was used to discretize the governing equations in space; the low-storage, three-order Runge-Kutta scheme was used for time integration. The comparisons between the statistical results of the flow field; the related experimental data were performed to validate the reliability of the present numerical schemes. The emphasis was placed on the study of the spatial evolution of the three-dimensional coherent vortex structures as well as their interactions. It is found that the evolution of the spanwise vortex structures in three-dimensional space is similar to that in two-dimensional jet. The spanwise vortex structures are subject to three-dimensional instability; induce the formation of the streamwise; lateral vortex structures. Going with the breakup; mixing of the spanwise vortex structures, the streamwise; transverse vortex tubes also fall to pieces; the mixing arranged small-scale structures are formed in the flow field. Finally, the arrangement relationship among the spanwise, the streamwise; the lateral vortex structures was analyzed; their interactions were also discussed.