B-314 微小突起によるバイモーダル励起された二次元噴流中の渦構造の制御

概要

論文の詳細を見る
Vortex deformation was investigated in a bimodally excited parabolic plane jet. To control three-dimensional deformation of vortex tubes, half-cylindrical tabs of 1mm in radius were attached beside the jet exhaust on the flat plates on both sides of the exhaust. The tabs were aligned at the same height for Casel and attached in staggered in Case2. In both cases, knee points on the vortex tubes appeared regularly just downstream of each tab. The most effective distance between the tabs was 36mm. The value corresponds to the mean wavelength of vertical wavy structure in the case without the tabs. Judging from the fact that the vortex structure became more wavy in Case2 than in Case1,the vortex arrangement seems to attain more stable condition when the wave structures along the vortex tubes on both sides of the symmetrical plane of the jet appear with half wavelength phase difference.
日本流体力学会の論文
2003-07-28