Abstract
Turbulent characteristics of a natural-convection boundary layer in air along a vertical plate heated at high temperatures have been investigated by using a particle image velocimetry and a cold wire. From the turbulent statistics measured at the wall temperature of 300℃, it is found that the effects of a strong heat on the turbulent behavior are quite small, and the profile measurements of the turbulent quantities in the boundary layer hold, the appearances observed under the conditions of low temperature differences. Namely, despite a remarkable increase in the wall temperature, the maximum intensity of velocity fluctuation occurs beyond the maximum mean velocity location. Simultaneously, the Reynolds stress <uv>^^^- becomes positive at the maximum mean velocity location and almost zero near the wall.
