FLOW CHARACTERISTICS AROUND THE DIFFUSER FOR TIDAL CURRENT GENERATION IN TSUGARU STRAIT

• EBIKO Tsubasa

  函館工業高等専門学校 技術教育支援センター

• MIYATAKE Makoto

  函館工業高等専門学校 社会基盤工学科

• SARUWATARI Ayumi

  北海道大学 大学院工学研究院

Bibliographic Information

Other Title

• 津軽海峡の潮海流発電のためのディフューザ周りの流れ特性
• ツガル カイキョウ ノ シオウミリュウ ハツデン ノ タメ ノ ディフューザ マワリ ノ ナガレ トクセイ

Abstract

 In exploring the feasibility of small-scale tide and ocean current power generation in the Tsugaru Strait, the two-dimensional circulation flow experiments using three types of diffuser models are performed as the initial step of examining the optimum shape of the diffuser suitable for the flow characteristics of the Tsugaru Strait. Expanding the two-dimensional diffuser model to three-dimensinal shape, three dimensional turbulence numerical simulations are conducted to investigate the relationship between the flow characteristics around the diffuser and the mechanism of increasing the internal passing velocity. The result of experiments and computations show that, in case of the gradual extended diffuser with flanges, the acceleration effect of internal passing velocity becomes further intensity due to the formation of vorticity wound up in the downward flow direction.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 74 (2), I_1387-I_1392, 2018

  Japan Society of Civil Engineers

Keywords

• power generation
• speed increment diffuser
• flange
• vortex rings
• negative pressure

Details

• CRID: 1390282763066402944
• NII Article ID: 40021715570
• NII Article ID: 130007503977
• DOI: 10.2208/kaigan.74.i_1387
• ISSN: 18838944
• ISSN: 18842399
• NDL BIB ID: 029327805
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029327805
• Web Site: https://www.jstage.jst.go.jp/article/kaigan/74/2/74_I_1387/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed