Numerical and Experimental Investigations on Hydrodynamic Performance of a Newly Designed Deep Bottom Trawl
文献类型： 外文期刊
作者： Guan, Qinglong 1 ; Zhu, Wenbin 1 ; Zhou, Aizhong 4 ; Wang, Yongjin 4 ; Tang, Weiyao 5 ; Wan, Rong 6 ;
作者机构： 1.Zhejiang Marine Fisheries Res Inst, Zhoushan, Peoples R China
2.Sci Observing & Expt Stn Fishery Resources Key Fis, Minist Agr & Rural Affairs Peoples Republ China, Zhoushan, Peoples R China
3.Key Lab Sustainable Utilizat Technol Res Fishery R, Zhoushan, Peoples R China
4.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai, Peoples R China
5.Zhejiang Ocean Univ, Fishery Coll, Zhoushan, Peoples R China
6.Shanghai Ocean Univ, Coll Marine Sci, Shanghai, Peoples R China
关键词： deep bottom trawl; hydrodynamic performance; finite element method; numerical simulation; physical model test
期刊名称：FRONTIERS IN MARINE SCIENCE （ 影响因子：5.247； 五年影响因子：5.72 ）
ISSN：
年卷期： 2022 年 9 卷
页码：
收录情况： SCI
摘要： In this paper, a new type of bottom trawl was designed for target fishing vessels to use in deep-water fishing grounds. The trawl's hydrodynamic performance was investigated using numerical simulation and physical modeling methods, and a numerical model based on the finite element method was proposed for estimating hydrodynamic forces and predicting performances. A series of physical model tests based on Tauti's law were carried out in a towing tank to explore the hydrodynamic performance of the trawl and to assess the applicability of the numerical simulation method. The results showed that the working towing speed of the trawl was 3.5 kn. The drag force and the height of net opening were 50 kN and 5.62 m, respectively, and the swept area was 128 m(2) at that speed. The simulated result was close to the experimental result, with a maximum relative error less than 20%, and an average relative error of 10%. The net shape and tension distribution of the trawl were analyzed using the numerical simulation method, and the hanging ratio in T-direction of the mesh of the codend was 0.25 at the working towing speed. The newly designed deep bottom trawl had a superior hydrodynamic performance for high catch efficiency and selectivity and may be applied to commercial fishing operations.
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