Flow structure around branch point and periodical oscillation in side branch at right-angle branch

Ryuhei Yamaguchi, Susumu Kudo, Hideaki Amagai, Masaya Shigeta, Toshiyuki Hayase

研究成果: Contribution to journalArticle査読

抄録

The flow structure and the periodical oscillation in the right-angle branch have been experimentally studied in laminar steady flow using laser Doppler velocimeter. The side branch bifurcates at right angle from the trunk, and both upstream and downstream corners at the entrance of the side branch are square edge. The axial and the transverse velocity components have been primarily measured for the trunk 12.2 mm in radius and the side branch 6 mm in radius. In addition, the velocity oscillation has been measured for several radii of side branch, 4, 5, 7, 9 mm. The wall shear stress at the upstream corner takes very large magnitude. The change of wall shear stress around the upstream corner is comparable to that around the flow divider, the downstream corner. Furthermore, it has been clarified that the periodical oscillation of velocity is induced in the side branch and the Strouhal number based on the variables in the side branch is constant in terms of the Reynolds number. Therefore, this periodical oscillation in the side branch is a characteristic flow phenomenon in the right-angle branch.

本文言語英語
ページ(範囲)2014-2019
ページ数6
ジャーナルNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
68
671
DOI
出版ステータス出版済み - 7 2002
外部発表はい

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 機械工学

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