Hokkaido University Graduate School of Engineering
Hokkaido University Graduate School of Engineering
Hokkaido University Graduate School of Engineering
出版者
航空宇宙技術研究所
出版者（英）
National Aerospace Laboratory (NAL)
雑誌名
航空宇宙技術研究所特別資料
雑誌名(英)
Special Publication of National Aerospace Laboratory
巻
40
ページ
33 - 34
発行年
1999-01
会議概要（会議名, 開催地, 会期, 主催者等）
30 Sep.-1 Oct. 1997 (21st). 26-27 Mar. 1998 (22nd)
会議概要（会議名, 開催地, 会期, 主催者等）（英）
30 Sep.-1 Oct. 1997 (21st). 26-27 Mar. 1998 (22nd)
Velocity measurements of a vortex ring were performed by eight single hot wire probes arranged along the circumference of a vortex ring and synchronized with visualization of the vortical structures using a thin laser light sheet. Turbulent fluctuations appeared in a part of the vortex core at the beginning of transition. The amplitude of the azimuthal waviness grew quickly during the transition process. Intricate windings were observed in the turbulent vortex core. The complexity disappeared and the turbulent fluctuation was damped in the final stage of the turbulent vortex ring. The onset of turbulence was observed at that part of the vortex core which was curved towards the center.
渦輪の乱流遷移過程
nalsp0040009.pdf
(1.62MB)
