複葉型オッターボードの流体特性に及ぼす湾曲板の縦横比および反り比の影響

DOI NDLデジタルコレクション 日本農学文献記事索引 Web Site 被引用文献5件 参考文献7件

書誌事項

タイトル別名
  • Effects of Aspect and Camber Ratios on Hydrodynamic Characteristics of Biplane-type Otter Board.
  • フクヨウガタ オッターボード ノ リュウタイ トクセイ ニ オヨボス ワンキョクバン ノ ジュウオウヒ オヨビ ソリ ヒ ノ エイキョウ

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説明

To examine the effect of aspect and camber ratios of two cambered boards on the hydrodynamics of biplane-type otter board, a series of experiments was carried out using 1/10 scale models in a circulating water tank. Seven-types of cambered boards were used as biplane-type otter board models; four aspect ratios (2.5, 3.0, 3.5, and 4.0) with the same camber ratio 15% and three camber ratios (10%, 15%, and 20%) with the same aspect ratio 3.0. The lift and drag forces of each of the models were measured at current speeds ranging from 0.40 to 1.20m/s. When a pair of cambered boards with the same aspect and camber ratios was assembled in all at the same gap-chord ratio of 0.9 and stagger angle of 30 degrees, there was no effective difference in the maximum lift coefficient among models of the four aspect ratios. The maximum lift coefficient of the model at camber ratio of 15% was larger than the other two models with 10% and 20% camber ratios. The model with the rear wing camber ratio larger than the fore one showed higher maximum lift coefficient. At the gapchord ratio smaller than 0.9 of the biplane-type otter board currently used by trawlers, the model with the fore and rear wings of the same aspect ratio of 4.0 showed the highest value in the maximum lift coefficient.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 65 (5), 860-865, 1999

    公益社団法人 日本水産学会

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