抄録
An experimental study has been performed to investigate the ice-layer transition phenomena observed in a channel which has a lower cooled wall kept less than the freezing temperature of water. The rectangular test channel with cross-sectional dimensions of 50mm by 19mm was used in the present measurements. The velocity distribution and the turbulence intensity in a flow passage were measured using the Laser Doppler Velocimeter setup on the two-dimensional traversing device. The freezing experiments were carried out under the condition of constant amount of flow even after the ice-layer developed in the channel. It was found that onset of the ice-layer transition might be closely related to the increase of the turbulence intensity in a flow along the developing ice-layer surface.
