Experimental Study on the Flow Phenomena behind Two Parallel Flat Plates

• SHIN B.

  Professor, Department of Mechanical Design Systems Engineering, University of Miyazaki

• ＡＲＡＴＡＫＥ Ｈｉｒｏｋｉ

  Metropolitan Police Department (Former undergraduate student of University of Miyazaki)

• ＫＯＮＤＯ Ｍａｓａｍｕｎｅ

  Graduate student, Graduate School of Engineering, University of Miyazaki

• ＯＺＯＮＯ Ｓｈｉｇｅｈｉｒａ

  Professor, Department of Mechanical Design Systems Engineering, University of Miyazaki

Bibliographic Information

Other Title

• 矩形断面を有する並列２平板背後の流れ現象に関する実験的研究

Abstract

The flow behind two flat plates in a parallel arrangement was experimentally investigated by varying the gap ratio (G/D) of the gap spacing (G) between the plates to the plate width (D). The flow patterns around the plates were observed using the hydrogen bubble flow visualization. Velocity components were acquired by employing hot-wire anemometers in the wind tunnel. From the investigation, it has been found that, at gap ratios of 0.1 ≤ G/D < 1.6, the gap flow was biased either upward or downward in a stable way. At 1.6 ≤ G/D < 2.0, the switching of the biased gap flow was observed due to the vortex interaction behind the plates, while at G/D ≥ 2.0, the gap flow was no longer biased. At gap ratios less than 2.0, two Strouhal numbers indicating the bi-stable state exist, and the vortex shedding frequency from the plate on the biased side decreases with the gap ratio.

Journal

• Journal of Wind Engineering

  Journal of Wind Engineering 44 (1), 1-10, 2019-01-31

  Japan Association for Wind Engineering

Keywords

• gap flow switching
• vortex interaction
• two flat plate
• parallel arrangement

Details

• CRID: 1390846609781312000
• NII Article ID: 130007760981
• DOI: 10.5359/jwe.44.1
• ISSN: 1349340X
• ISSN: 13493507
• Web Site: https://www.jstage.jst.go.jp/article/jwe/44/1/44_1/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed