上壁のある円形衝突噴流により浮上する円盤に働く揚力 : (第2報, 圧力分布と揚力)

概要

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Experimental studies on the lift acting on a disk levitated by a circular impinging jet with confining wall were carried out. The diameters of upper and lower disks were 100 mm and 75 mm, respectively. The pressure distributions on the both disks were measured in the range of the space between the two disks from 0.5 to 6 mm at the flow rate 251/min, and the surface oil-flow patterns on the both disks were visualized. The conclusions obtained are as follows : The impinging jet rebounds and reattaches on the upper disk, and a separation bubble is formed on the upper disk. Then, the vena contracta occurs by the existence of the separation bubble, and a large pressure drop arises. After all, a large lift is established. This is the main reason for the levitation of the disk.
一般社団法人日本機械学会の論文
2000-08-25