急拡大円管内の周期的非定常流

• 福井 啓介

  姫路工業大学工学部 産業機械工学科

書誌事項

タイトル別名

• Periodic Unsteady Flow in an Expanded Pipe.
• キュウ カクダイ エンカンナイ ノ シュウキテキ ヒテイジョウリュウ

抄録

The characteristics of periodic unsteady flow in an expanded pipe in which mass flow rate changes sinusoidally were investigated through flow visualization and numerical analysis. The flow patterns at the expansion were classified into four types; three flow patterns of stable two-dimensional flow and another flow pattern of unstable three-dimensional flow at the transition to turbulence. The effects of frequency and two Reynolds numbers based on time-averaged and amplitude flow rate upon the flow characteristics were discussed. It was found that a specific frequency of 1.5 Hz existed in the present study. This frequency contributed sensitively to flow pattern and flow stability. The fine structure of the flow at the expansion were elucidated from numerical predictions and flow-visualized photographs. These results clearly showed the details of the occurrence and dissipation processes of separated vortices and vortex-trajectory at the expansion. The relationships of flow structure and flow stability were also discussed.

収録刊行物

• 化学工学論文集

  化学工学論文集 21 (5), 871-878, 1995

  公益社団法人 化学工学会

キーワード

• Fluid Mechanics
• Periodic Flow
• Unsteady Flow
• Separated Vortex
• Flow Instability
• Expanded Pipe

詳細情報

• CRID: 1390282679487450240
• NII論文ID: 10001718435
• NII書誌ID: AN00037234
• DOI: 10.1252/kakoronbunshu.21.871
• ISSN: 13499203
• ISSN: 0386216X
• NDL書誌ID: 3622351
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3622351
• Web Site: http://www.jstage.jst.go.jp/article/kakoronbunshu1975/21/5/21_5_871/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可