GROWING PROCESS AND STRUCTURE OF AXISYMMETRIC VORTEX BREAKDOWN. (1st REPORT, AN INVISCID LINEAR MODEL OF THE GROWING PROCESS OF A BUBBLE).

Yoshikazu Suematsu, Tadaya Ito, Toshiyuki Hayase, Norihiko Kato

研究成果: Article査読

抄録

This paper examines the axisymmetric type vortex breakdown in a swirling pipe flow, in order to clarify the growing process of a bubble. The unsteady flow field is investigated based on the inviscid linear theory of the internal wave (inertia wave). An expression of the time-dependent flow field with the internal wave propagation, which satisfies the condition of arbitrary velocity change at the upstream boundary of the circular pipe, is derived. Using this expression, the transition of the flow field, the streamlines and the streaklines calculated by computer are examined. The unsteady flow field, as the result of a sudden azimuthal velocity change at the upstream boundary, clearly shows the birth of a bubble and its growing process into a stationary state.

本文言語English
ページ(範囲)773-780
ページ数8
ジャーナルBulletin of the JSME
29
249
DOI
出版ステータスPublished - 1986
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)

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