수산해양기술연구 (Journal of the Korean Society of Fisheries and Ocean Technology)

  • 제44권2호
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  • Pages.120-128
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  • 2008
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  • 2671-9940(pISSN)
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  • 2671-9924(eISSN)
한국수산해양기술학회 (The Korean Society of Fisheries and Ocean Technology)
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저층 트롤의 그물입구 형상과 소해 단면적

The gear shape and cross section of sweep at mouth of a bottom trawl

  • 박해훈 (국립수산과학원 동해수산연구소 어업자원과) ;
  • 조봉곤 (군산대학교 해양생산학) ;
  • 고광수 (군산대학교 해양생산학) ;
  • 장호영 (군산대학교 해양생산학)
  • Park, Hae-Hoon (Fisheries Resources Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Cho, Bong-Kon (Marine Science & Production Major, Kunsan National University) ;
  • Ko, Gwang-Su (Marine Science & Production Major, Kunsan National University) ;
  • Chang, Ho-Young (Marine Science & Production Major, Kunsan National University)
  • 발행 : 2008.05.31
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초록

Estimation of the gear shape and cross section of sweep at mouth of a bottom trawl net was described and applied to the field experiments obtained with the Scanmar system. The shape of the trawl net from wingend to the beginning of codend was assumed to be part of an elliptic cone of which the cross section was ellipse, and that of the float rope be of form $y_f=a_fx^{bf}$. In case of a bottom trawl with warp 180m long, the radius of ellipse, the cross section of sweep at mouth, the eccentricity of the ellipse, the inclination angle of float rope and the contribution of the side panel to net height were estimated in accordance with towing speed. The horizontal radius of the upper ellipse increased with increasing towing speed, the eccentricity of it became slightly bigger as increasing the towing speed which meant the shape of it being flat. And the inclination angle of the float rope was about between 7 and 12 degrees in case of the above bottom trawl.

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참고문헌

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피인용 문헌

  1. The geometrical gear shape of a bottom trawl vol.89, 2014, https://doi.org/10.1016/j.oceaneng.2014.06.034
  2. An estimated angle of attack of a cambered otter board in a bottom trawl using three dimensional position vol.51, pp.1, 2015, https://doi.org/10.3796/KSFT.2015.51.1.026
  3. Model test on the net mouth shape of a gape net according to current speeds in Jindo area, Korea vol.51, pp.1, 2015, https://doi.org/10.3796/KSFT.2015.51.1.146