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首页> 外文期刊>Ocean Engineering >Hydrodynamic performance of a newly-designed Antarctic krill trawl using numerical simulation and physical modeling methods
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Hydrodynamic performance of a newly-designed Antarctic krill trawl using numerical simulation and physical modeling methods

机译：数值模拟和物理建模方法对新设计的南极磷虾拖网的水动力性能

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摘要

Antarctic krill (Euphausia superba) is one of the most abundant commercial species in the world and still has great potential for further development and utilization. It is, however, very important that the resource is utilized in a sustainable manner in terms of efficiency and selectivity, which can be enhanced through proper design of pelagic trawls that are used for harvesting the species. Pelagic trawls rely heavily on hydrodynamic forces acting on the netting to form desirable shapes. It is thus crucial to understand hydrodynamic forces acting on the trawl to predict its performance. A large Antarctic krill trawl with a net opening circumference of 200 m was designed for a fishing vessel (2855 kW) and analyzed by numerical simulation and physical model tests. A numerical model of Antarctic krill trawl was established based on the finite element method. The principle of minimum potential energy was employed to determine the equilibrium configuration and the tension distribution of the trawl in a uniform current. The Newton-Raphson method was applied to solve the equilibrium equation. A series of physical model tests were conducted in a flume tank to verify the result from numerical simulation. The results showed that the trawl with a net opening circumference of 200 m had superior hydrodynamic performance and could be well matched with fishing vessels of the class for the efficient production of Antarctic krill. This paper demonstrates the use of scientific methods for the design of large Antarctic krill trawls and the application of numerical simulation to study the hydrodynamic performance.
机译：南极磷虾（Euphausia superba）是世界上最丰富的商业物种之一，仍然具有进一步开发和利用的巨大潜力。但是，非常重要的是，就效率和选择性而言，以可持续的方式利用资源，可以通过适当设计用于捕捞该物种的远洋拖网来增强资源。远洋拖网严重依赖作用在网上的水动力形成理想的形状。因此，了解作用在拖网上的流体动力以预测其性能至关重要。设计了一个净开口周长为200 m的大型南极磷虾拖网，用于一艘渔船（2855 kW），并通过数值模拟和物理模型测试进行了分析。基于有限元方法建立了南极磷虾拖网的数值模型。采用最小势能原理来确定拖网在均匀电流中的平衡构型和张力分布。用牛顿-拉夫森法求解平衡方程。在水槽水箱中进行了一系列物理模型测试，以验证数值模拟的结果。结果表明，拖网净开口周长为200 m，具有出色的水动力性能，可与该类渔船很好地匹配，以高效生产南极磷虾。本文论证了科学方法在大型南极磷虾拖网设计中的应用以及数值模拟在研究水动力性能中的应用。

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  • 来源
    《Ocean Engineering》 |2019年第1期|173-179|共7页
  • 作者

    Wan Rong; Jia Mingxiu; Guan Qinglong; Huang Liuyi; Cheng Hui; Zhao Fenfang; He Pingguo; Hu Fuxiang;

  • 作者单位

    Ocean Univ China, Fishery Coll, Qingdao 266003, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266000, Shandong, Peoples R China|Shanghai Ocean Univ, Minist Educ, Natl Engn Res Ctr Ocean Fisheries, Coll Marine Sci,Key Lab Sustainable Exploitat Oce, Shanghai 201306, Peoples R China;

    Ocean Univ China, Fishery Coll, Qingdao 266003, Peoples R China|China Natl Fisheries Corp, Beijing 100160, Peoples R China;

    Ocean Univ China, Fishery Coll, Qingdao 266003, Peoples R China;

    Ocean Univ China, Fishery Coll, Qingdao 266003, Peoples R China;

    Ocean Univ China, Fishery Coll, Qingdao 266003, Peoples R China;

    Ocean Univ China, Fishery Coll, Qingdao 266003, Peoples R China;

    Univ Massachusetts Dartmouth, Sch Marine Sci & Technol, New Bedford, MA 02744 USA;

    Tokyo Univ Marine Sci & Technol, Dept Marine Sci & Technol, Minato Ku, Tokyo 1088477, Japan;

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  • 正文语种 eng
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  • 关键词

    Antarctic krill trawl; Numerical simulation; Physical model test;

    机译：南极磷虾拖网;数值模拟;物理模型试验;

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