円管内パフの発生メカニズム

• 松内 一雄

  筑波大学・構造工学

• 安達 勤

  筑波大学・構造工学

書誌事項

タイトル別名

• Generation of Puffs in a Pipe.

抄録

It is well known that a peculiar turbulent lump called a “puff” appears in a transitional pipe flow. The puff is stable and has a self-sustained mechanism. Several authors have reported on remarkable characteristics of puffs. However, the condition for the generation of puffs has hardly been studied, because it is very difficult to measure the flow properties simultaneously at different axial locations without disturbing the downstream condition. In order to know the generation, two specially designed hot wires were set upstream to measure the initial growth of the puff, and a third wire was located far downstream for detection of equilibrium puffs. Experiments were made at Reynolds numbers near 2200. In two inlet conditions of the pipe, the effect of the strength of inlet disturbances on the generation was investigated. As a result, conditions for the generation and growth of puffs were clarified.

収録刊行物

• 日本流体力学会誌「ながれ」

  日本流体力学会誌「ながれ」 12 (2), 147-156, 1993

  社団法人 日本流体力学会

キーワード

• Pipe Poiseuille flow
• Puff
• Transitional flow
• Hot-wire anemometer
• Generation of disturbances

詳細情報

• CRID: 1390282679674067456
• NII論文ID: 10008003563
• NII書誌ID: AN00175191
• DOI: 10.11426/nagare1982.12.147
• ISSN: 21854912
• ISSN: 02863154
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可