In this paper, turbulence characteristics of boundary layer flow over a heated punching board have been analyzed. Two kinds of heated board, which are a smooth board and a punching board, are tested in a vertical wind tunnel. The diameter of holes is 20mm with staggered arrangement in a punching board and the boards are 10mm in thickness. These studies are made by means of PIV (Particle Image Velocimetry). The mean flow velocity is 4.5 m/s and the relative turbulence intensity is 1.5 %.Comparisons of the mean velocity and turbulence intensity are made for the smooth and punching boards under heated or non-heated conditions.
