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ISSN 2095-1388

主管 辽宁省教育厅

主办 大连海洋大学

不同水平扩张比和模拟渔获物对南极磷虾拖网整体形态的影响

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2023. 不同水平扩张比和模拟渔获物对南极磷虾拖网整体形态的影响. 大连海洋大学学报, 38(2): 331-339. doi: 10.16535/j.cnki.dlhyxb.2022-188
引用本文: 2023. 不同水平扩张比和模拟渔获物对南极磷虾拖网整体形态的影响. 大连海洋大学学报, 38(2): 331-339. doi: 10.16535/j.cnki.dlhyxb.2022-188
ZHU Meixi, TANG Hao, LIU Wei, ZHANG Feng, SUN Qiuyang, XU Liuxiong, HU Fuxiang. 2023. Effects of horizontal opening ratio and simulated catch on whole configuration of Antarctic krill trawl net. Journal of Dalian Ocean University, 38(2): 331-339. doi: 10.16535/j.cnki.dlhyxb.2022-188
Citation: ZHU Meixi, TANG Hao, LIU Wei, ZHANG Feng, SUN Qiuyang, XU Liuxiong, HU Fuxiang. 2023. Effects of horizontal opening ratio and simulated catch on whole configuration of Antarctic krill trawl net. Journal of Dalian Ocean University, 38(2): 331-339. doi: 10.16535/j.cnki.dlhyxb.2022-188

不同水平扩张比和模拟渔获物对南极磷虾拖网整体形态的影响

  • 基金项目:

    国家自然科学基金(31902426)

    上海市青年科技英才扬帆计划资助(19YF1419800)

详细信息
    作者简介:

    朱美熹(1999-),女,硕士研究生。E-mail:zhumx2021@163.com

  • 中图分类号: S972.13

Effects of horizontal opening ratio and simulated catch on whole configuration of Antarctic krill trawl net

  • Fund Project: 上海市青年科技英才扬帆计划资助(19YF1419800)
  • 为了解不同工况条件下的网具形态变化,以南极磷虾捕捞船"龙腾"轮采用的四片式拖网为研究对象,基于修正的田内准则制作1/35的模型网进行循环动水槽试验,考察流速(v)、水平扩张比(L/S)和渔获物对网具(整体形态、阻力和能耗系数)的影响。结果表明:拖网网口形状随流速、L/S的增大呈被"压缩"趋势,当L/S=0.35、v=30 cm/s时,网口形态最佳,网囊中有或无模拟渔获物时的网口形状变化情况相似;流速一定时,网口面积随L/S的增大而增大,L/S一定时,网口面积随流速的增大而减小,在低流速、高水平扩张比条件下,有模拟渔获物时的网口面积随流速、L/S改变而变化的程度较空网时更小;网身随流速、L/S的增大同样呈被"压缩"趋势,且L/S改变时的"压缩"程度较流速更大,有模拟渔获物时的网身末端上扬现象较空网时更明显,且网身长度较空网时明显增长;流速不变时,随L/S的增大,网具阻力增加,能耗系数减小,且二者的变化程度均呈减缓态势;而L/S不变时,随流速的增大,网具阻力和能耗系数均增大,有模拟渔获物时的网具阻力与能耗系数较空网时更大,且流速越大, 网具能耗系数与空网时的差异越大。研究表明,当L/S=0.35、v=3.0 kn时,可使网具以较佳作业性能运行。
  • 加载中
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收稿日期:  2022-06-09

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