AN EXPERIMENTAL STUDY ON CONVECTIVE HEAT TRANSFER COEFFICIENT DISTRIBUTION ON THERMAL MANIKIN BY AIR FLOW WITH VARIOUS VELOCITIES AND TURBULENCE INTENSITIES

Abstract

The impact of velocity and turbulence intensity of airflow on convective heat transfer coefficient distribution on a thermal manikin was experimentally investigated using a turbulence intensity changeable low airflow producer. When the velocity of forced airflow was below 0.2 m/s, the convective heat transfer coefficient changed little at the lowest part of the foot and increased at the upper part compared to the condition of natural convection. It increased over the whole surface when forced airflow was over 0.3 m/s. The heat transfer coefficient increased significantly with the turbulence intensity, when the forced convection was over 0.3 m/s.