一様流における養殖生簀用平面網地の流体力特性について  [in Japanese] Hydrodynamic characteristics of plane netting used for aquaculture net cages in uniform current  [in Japanese]

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Author(s)

    • 董 書闖 DONG SHUCHUANG
    • 東京海洋大学大学院海洋科学技術研究科 Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology
    • 胡 夫祥 HU FUXIANG
    • 東京海洋大学大学院海洋科学技術研究科 Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology
    • 塩出 大輔 SIODE DAISUKE
    • 東京海洋大学大学院海洋科学技術研究科 Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology
    • 東海 正 TOKAI TADASHI
    • 東京海洋大学大学院海洋科学技術研究科 Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology

Abstract

養殖生簀に使われているポリエチレン(PE)製の菱目と角目網地および金網を用いて水槽実験で流れに平行と直角な場合の抗力,および流れに傾けたときの PE 菱目網地と金網の抵抗を計測した。流れに平行な網地の抗力係数は PE 菱目網地,角目網地,金網の順に大きくなることと流れに直角な網地の抗力係数は PE 網地に比べて金網で 0.8-0.9 倍になることが確かめられた。さらに,PE 菱目網地および金網の抗力係数と揚力係数はレイノルズ数,網目係数と迎角の関数で表わすことができ,現場の生簀の挙動を予測するために利用できる。

The hydrodynamic characteristics of polyethylene (PE) netting and chain link wire netting with different types of twine diameter and mesh size for aquaculture net cages were examined by experiments in a flume tank. The drag coefficient <i>C</i><sub><i>D</i>0</sub> of plane netting set parallel to the water flow increases in the order of PE netting with diamond mesh, PE netting with square mesh and chain link wire netting. The drag coefficient <i>C</i><sub><i>D</i>90</sub> of the chain link wire netting set normal to the water flow was 0.8-0.9 times that of the PE netting. Moreover, the drag coefficient <i>C</i><sub><i>D</i>θ</sub> and lift coefficient <i>C</i><sub><i>Lθ</i></sub> of PE netting and chain link wire netting set at various angles of attack to the water flow were estimated by empirical equations as functions of <i>C</i><sub><i>D</i>0</sub>, <i>C</i><sub><i>D</i>90</sub>, mesh factor and angle of attack, which provide a relevant basis for analyzing and predicting the behavior characteristics of cages in the sea.

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 82(3), 282-289, 2016

    The Japanese Society of Fisheries Science

Codes

  • NII Article ID (NAID)
    130005156369
  • NII NACSIS-CAT ID (NCID)
    AN00193422
  • Text Lang
    JPN
  • Article Type
    journal article
  • ISSN
    0021-5392
  • NDL Article ID
    027445982
  • NDL Call No.
    Z18-345
  • Data Source
    NDL  J-STAGE  JASI 
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