Effect of rough surface on flow characteristics of turbulent boundary layer*

In this study, the characteristics of turbulent boundary layer in flow field on the rough surface were examined in boundary layer wind tunnel. The cube arrays patch has a pattern of staggered and aligned towards the windward direction. The boundary layer characteristics such as mean velocity, turbulent quantities were measured using thermal anemometry. Results show that turbulent boundary layer have been generated successfully on the roughness surface, and the boundary layer characteristics vary depending on the pattern of surface roughness. In order to validate the measurement data in wind tunnel, the turbulent boundary layer was also simulated using the numerical simulation.