Wind Tunnel Experiment on Improving Efficiency of Low-Re Number Grid Turbulence Generation Focusing on Cross-Sectional Geometry of Grid Bars

• 資料種別: 記事
• タイトル: Wind Tunnel Experiment on Improving Efficiency of Low-Re Number Grid Turbulence Generation Focusing on Cross-Sectional Geometry of Grid Bars
• 著者・編者: Wakana UEDA; Hiroki SUZUKI; Yutaka HASEGAWA
• 著者標目: Wakana UEDA; Hiroki SUZUKI; Yutaka HASEGAWA
• タイトル（掲載誌）: Advanced experimental mechanics / Editorial board for advanced experimental mechanics [編]
• 巻号年月日等（掲載誌）: 10:2025.8
• 掲載巻: 10
• 掲載ページ: 48-53
• 掲載年月日（W3CDTF）: 2025-08
• ISSN（掲載誌）: 2189-4752
• ISSN-L（掲載誌）: 2189-4752
• 出版事項（掲載誌）: Niigata : The Japanese Society for Experimental Mechanics
• 出版地（国名コード）: JP
• 本文の言語コード: eng
• 件名標目: Fluid mechanics; Turbulence; Wind tunnel experiment; Grid turbulence; Drag coefficient
• NDLC: ZM17
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z63-D560
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 034429791; http://id.ndl.go.jp/bib/034429791
• 整理区分コード: 632

• 要約等: <p>The aim of this study is to investigate the efficiency of turbulence generation using turbulence grids, focusing on the cross-sectional shapes of the grid bars. Efficiency in this context refers to maintaining the intensity of velocity fluctuations in the generated turbulence while reducing the drag coefficient of the turbulence grid. Wind tunnel experiments were conducted using turbulence grids with three different cross-sectional shapes (circular, square, and rectangular), and the velocity fluctuation intensity and drag coefficient of the generating grids were measured. The results showed that the turbulence grid with square and rectangular cross sections produced higher velocity fluctuation intensities higher than those with circular cross sections, and the distributions of these intensities were consistent between the two shapes. In addition, the turbulence grid with a rectangular cross section had a drag coefficient about 10% lower than that of the square cross section. These results suggest that a rectangular turbulence grid may be more efficient at generating turbulence.</p>
• DOI: 10.11395/aem.25-0003
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: <p>The aim of this study is to investigate the efficiency of turbulence generation using turbulence grids, focusing on the cross-sectional shapes of the grid bars. Efficiency in this context refers to maintaining the intensity of velocity fluctuations in the generated turbulence while reducing the drag coefficient of the turbulence grid. Wind tunnel experiments were conducted using turbulence grids with three different cross-sectional shapes (circular, square, and rectangular), and the velocity fluctuation intensity and drag coefficient of the generating grids were measured. The results showed that the turbulence grid with square and rectangular cross sections produced higher velocity fluctuation intensities higher than those with circular cross sections, and the distributions of these intensities were consistent between the two shapes. In addition, the turbulence grid with a rectangular cross section had a drag coefficient about 10% lower than that of the square cross section. These results suggest that a rectangular turbulence grid may be more efficient at generating turbulence.</p>
• DOI: 10.11395/aem.25-0003; https://doi.org/10.11395/aem.25-0003
• 関連情報（URI）: http://id.ndl.go.jp/bib/034429791; https://ndlsearch.ndl.go.jp/books/R000000004-I034429791
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 034429791; http://id.ndl.go.jp/bib/034429791