K-1326 縦渦による壁面噴流の操縦における積極的導入の試み(S15-8 はく離の制御(1))(S15 噴流・はく離流れの計測と制御)

概要

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Effectiveness of an active management technique of a stronger wall jet was studied experimentally with a streamwise vortex generated by a half-delta wing located on the wall. The angle of attack is oscillated at a constant frequency to amplify spanwise wandering of generated streamwise vortex. The mean velocity and Reynolds shear stress profiles were measured and momentum flux was calculated. The interaction between the stronger wall jet and streamwise vortex reduces magnitude of Reynolds shear stress in the outer layer. However, momentum flux is increased. Remarkable decrease of static pressure due to the streamwise vortex was confirmed throughout the whole shear layer. The active management technique controls these effects of vortex in the interaction process.
2001-08-22