Experimental Study of Turbulent Boundary Layers on Groove/Smooth Flat Surfaces

作     者：Hongwei MA Qiao TIAN Hui WU 

作者机构：School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing 100083 China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2005年第14卷第3期

页      面：193-197页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project funded by National Natural Science Foundation of China  Grant No.50376002. 

主　　题：湍流边界层 光滑表面 隧道效应 流体力学 

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.