摘要
在水槽中用氢气泡法观测了一个后向台阶的回流区、再附区和边界层再生区的大涡和湍流团的发展,以及近壁区的流动结构,观察到大涡结构对湍流团产生的作用。
The coherent structures of the flows in the recirculate region, reattaching region and tht boundary layer redeveloping region behind a backward facing step were investigated experimentally. The step height is 2cm, and the Reynolds number based on step height is 1900 to 3400. The flow structures were visualized by hydrogen bubble technique. The large vortical structures in the outer region and the streaky structures in the wall region were investigated.
出处
《力学学报》
EI
CSCD
北大核心
1993年第2期129-133,T001,3,共7页
Chinese Journal of Theoretical and Applied Mechanics
基金
自然科学基金
航空科学基金
关键词
拟序结构
后向台阶
湍流
coherent structure, backward facing step, flow visualization
