中文摘要：

这份报纸在沟和光滑的扁平的表面上论述狂暴的边界层的试验性的调查。流动结构用氢水泡流动可视化技术在一条水隧道被显示出。测量结果显示那：(1 ) 沟能有效地减少低速度的液体的累积，减少低速度的条纹的数字并且在 sublayer 压抑条纹的摆动；(2 ) 沟能制止在缓冲区区域马蹄铁旋涡形成；(3 ) 沟减弱 quasi-streamwise 旋涡的摆动和 kinking 并且制止发卡旋涡和戒指旋涡的生产，减少爆炸的骚乱的频率和紧张；(4 ) 沟直接在边界层的 sublayer 影响流动结构然后由制止旋涡的开发和相互作用调制流动地直到缓冲区区域和对数的区域。关键词 streamwise 沟 - 狂暴的边界层 - 拖减小机制 - 协调结构 - 中国的国家自然科学基础资助的氢水泡流动可视化 CLC 数字 O357.5 工程，资助 No.50376002。

英文摘要：

This paper presents an experimental investigation of the turbulent boundary layers on both groove and smooth flat surfaces. The flow structures were shown in a water tunnel using the hydrogen-bubble flow visualization technique. The measurement results indicate that： （1） the grooves can effectively reduce accumulation of low-speed fluids, decrease the number of the low-speed streaks and depress oscillation of the streaks in the sublayer; （2） the grooves can restrain forming of the horseshoe vortices in the buffer region; （3） the grooves bate oscillation and kinking of the quasi-streamwise vortices and restrain production of the hairpin vortices and the ring vortices, reducing both frequency and intensity of the turbulence bursting; （4） the grooves directly affect the flow structures in the sublayer of the boundary layer and then modulate the flow field up to the buffer region and the logarithmic region by restraining development and interaction of the vortices.