鈍頭模型による弓型衝撃波‐乱流境界層干渉場の実験的研究

Abstract

Bow shock wave/turbulent boundary layer interaction regions induced by a blunt body have been experimentally investigated carefully. By selecting the displacement h, between a flat plate and a blunt body simulating Solid Rocket Booster (SRB), as the main parameter, the effects of the displacement on the flowfields are examined. Flowfields are visualized by use of the Schlieren method and oil flow technique, then surface pressure distributions are measured for various h, 5, 10, 15 and 20mm. For small h, the secondary separation with the primary separation is observed, and there exists a new weak separation downstream of the attachment line. On the contrary for large h, no secondary separation is observed, and the flow structure becomes much simple. The results show that the peak pressure is rapidly decreased as h is increased, also as apart from the centerline. Clearly the displacement affects the interaction region considerably.