Effects of Coriolis Force on the Turbulent Boundary Layer with Pressure Gradients

Abstract

Distributions of velocity and turbulent intensities in turbulent boundary layers developed in a diffuser were studied experimentally when the diffuser was rotated about an axis perpendicular to it. with an increase in the opening angle of the diffuser, the turbulent intensities and the time mean velocity gradient increased more near the pressure side wall, but decreased further near the suction side wall due to the effects of the Coriolis force. On the pressure side wall, turbulent intensities was enhanced by rotation, and the Monin-Oboukhov formula was ascertained to be approximately established within the experimental range even in a adverse pressure gradient.