Hydrodynamic simulation and experiment of depth adjustable beam trawl for Antarctic krill

文献类型： 外文期刊

第一作者： He, Ruilin

作者： He, Ruilin;He, Ruilin;Zheng, Hanfeng;Ma, Shuo;Wu, Yumei;Yang, Shenglong;Dai, Yang;Wang, Yongjin;He, Ruilin;Wu, Yumei;Yang, Shenglong;Dai, Yang

作者机构：

关键词： Pelagic fishery; Trawl; Antarctic krill; Numerical analysis; Water channel

期刊名称：JOURNAL OF MARINE SCIENCE AND TECHNOLOGY （ 影响因子：2.6； 五年影响因子：2.5 ）

ISSN： 0948-4280

年卷期： 2023 年 28 卷 2 期

页码：

收录情况： SCI

摘要： At present, the primary fishing method of Antarctic krill is beam trawl, in which the fishing vessel drags the beam equipped with nets through the trawl warp for midwater trawling. Due to the behavioral characteristic of collective activities, the shoal of Antarctic krill often appears in some specific depths of the sea. The existing fishing method needs to adjust the trawling depth by modifying the length of the trawl warp and the navigation speed of the vessel, which cannot adjust the trawling depth independently. To solve this problem, we proposed a depth variable device installed on the beam to adjust the trawling depth independently, aiming to track the depth where the shoal of Antarctic krill is located for accurate fishing. Investigate the hydrodynamic feature of the proposed beam trawl device by numerical analysis and water channel experiment to design the wing's profile and determine the effective range of angle of attack. It was found that when the angle of attack of the wing is 0 degrees-17.7 degrees, the regulation effect of depth adjusting is better. The analysis results can be used as the parameter basis for compiling the control program for the depth variable beam.

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