The vortex ring impinging onto a flat plate (horizontal cross section of the velocity field)

Taiichi Nagata, Shigeaki Masuda, Shinnosuke Obi

研究成果: Article

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As a part of the laboratory experiment on a microburst, the circumferential instability and the associated instantaneous velocity field of a vortex ring impinging onto a normal wall have been investigated. Vortex rings have been generated at the circular orifice by the impulsive motion of the speaker corn and have been visualized by filling ethylene glycol smoke. The instantaneous velocity fields induced by a vortex ring were measured by employing the PIV in which the cross correlation method was used. The wave number of the circumferential instability increases with an increase of the initial Reynolds number. The wave number at the same initial Reynolds number decreases as the distance from the orifice increases. It was shown that the development of induced secondary vortex ring influences the change of velocity vector fields.

元の言語English
ページ(範囲)990-996
ページ数7
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
66
発行部数644
DOI
出版物ステータスPublished - 2000 4
外部発表Yes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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