波状分割板が平板乱流後流の三次元特性に与える影響

抄録

An experimental investigation has been made on the separated flow region behind a long flat plate with a blunt trailing edge. The flow was controlled by an additional corrugated sheet (CS) fitted to the trailing edge along the wake center line. The length of CS was adjusted 10, 20 and 60 mm. The instantaneous streamwise velocity of the wake with CS was measured by a single-hot-wire probe. 3D structure of the dominant shedding frequency just behind the trailing edge of the test flat plate, varying according to the length and shape of CS, was detected. Moreover, the change of flow pattern with CS, suggesting 3D structure, was visualized by using smoke-wire method. The results imply the three-dimensionality of the separated flow caused by the installation of CS.