1922 脈動渦輪の形成へ及ぼすノズル内壁面境界層の影響(S21-4 噴流,後流及びはく離流れの流動解析と応用(4),21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

論文の詳細を見る
The effect of pulsatile flow conditions on the behavior of a wall boundary layer in a nozzle and the formation of a vortex ring induced by pulsatile jet flow is investigated by LES analysis and PIV measurement. The waveform of a pulsatile flow is performed by cosine curves. The result indicates that the amplitude condition of flow influence of the vorticity in a wall boundary layer and the separating time of a wall boundary layer. Separated boundary layer, which is shown negative vorticity area inside a nozzle, is attached vortex core region in the way of forming and is caused the change of a vortex ring diameter or a diffusion process of the vortex core region. The stop period of flow effect on diffuse vorticity in a separated boundary layer and so it doesn't effect on the vortex core region.
社団法人日本機械学会の論文
2008-08-02