スパン方向に吹き出す膜冷却における冷却空気の挙動 : 第1報,時間平均速度場と温度場  [in Japanese] Behavior of Cooling Jet in the Lateral Injection in Film Cooling : 1st Report, Time-Averaged Velocity and Temperature Field  [in Japanese]

The present paper describes the behavior of the cooling jet on the flat surface in the lateral injection in film-cooling. Simultaneous velocity and temperature measurements were made by the double-wire probe. The test surface was also covered with an encapsulated temperature-sensitive liquid crystal. The surface temperature distributions were obtained by the image-processing system of the liquid crystal. The tests were conducted at three mass flux ratios. The laterally injected jet has an asymmetric structure with a large scale of vortex motion on one side caused by the interaction with the primary stream. Asymmetry is promoted with increase of the mass flux ratio, resulting in low film-cooling effectiveness.