Abstract
Investigation of tripping influence on a turbulent boundary layer was attempted by means of five different tripping devices including classical circular rods and 'V' shape embossment. Spatiotemporal correlation between the wall pressure and the streamwise velocity fluctuations was focused as well as basic statistics such as mean velocity and fluctuation profiles. Measurements were made with a MEMS microphone sensor array that was recently improved. The result shows that pressure distributions capture the local pressure fluctuations due to turbulent disturbances, and its auto-correlation indicates that there exist disturbances of the small spanwise scale. This modified array is expected to reveal the tripping influence on a turbulent boundary layer.
