F211 軸対称放物体の走行に伴う剥離渦の画像速度計測(F-21 大迎角物体まわりの非定常・剥離流(2),一般講演)

概要

論文の詳細を見る
PIV measurements of wake vortices behind an axisymmetric paraboloid were made in an air chamber with a towing model at high angles of attack. PIV recordings were obtained in a plane perpendicular to the body axis to study detailed structure of the vortices in the cross-sectional flow. The λ_2-definition was used to detect vortex cores from PIV data and contra-rotating vortices are observed inside the main vortex. It is found that the shear layer originated from the secondary separation line is taken into the outer edge of the main vortex, interacting with the shear layer from the primary separation line, accompanied by the formation of a vortex street. These contra-rotating small vortices are taken into the main vortex, which causes the segmentation and spreading of the main vortex core.
日本流体力学会の論文
2004-08-09