K-1828 Temperature Profiles in Turbulent Boundary Layer Subjected to Adverse Pressure Gradient

Abstract

Characteristics of turbulent boundary layer flows with adverse pressure gradients (APGs) differ significantly from those of canonical boundary layers. We have experimentally investigated the effects of APG on the mean velocity and temperature profiles in a thermal boundary layer developing on the uniformly heated plate. It is found that, in the APG boundary layer, the conventional thermal law of the wall does not hold in the fully turbulent region. Moreover, turbulent Prandtl number decreases in the fully turbulent region. These findings indicate that heat transfer is greatly enhanced under the APG conditions.