- Volume 51 Issue 1
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An estimated angle of attack of a cambered otter board in a bottom trawl using three dimensional position
저층 트롤에서 3차원 위치를 이용한 만곡형 전개판의 영각 추정
- Go, Gwang Su (Kunsan National University Training Ship) ;
- Chol, Bong Kon (Marine Science & Production Major, Kunsan National University) ;
- Bae, Jae Hyun (East Sea Fisheries Research Institute) ;
- Cho, Seong-Ok (Gunsan Branch, Korea Ship Safety Technology Authority) ;
- Won, Sung-Jae (BMINTERNATIONAL) ;
- Yoon, Hong Keun (BMINTERNATIONAL) ;
- Park, Hae-Hoon
- 고광수 (군산대학교 실습선) ;
- 조봉곤 (군산대학교) ;
- 배재현 (동해수산연구소) ;
- 조성옥 (선박안전기술공단) ;
- 원성재 ((주)비엠인터내셔널) ;
- 윤홍근 ((주)비엠인터내셔널) ;
- Received : 2014.10.07
- Accepted : 2015.02.17
- Published : 2015.02.28
The angle of attack of a cambered otter board in a bottom trawl was estimated using a three-dimensional semi-analytic treatment of a towing cable (warp) system that was applied to the field experiments of a bottom trawl obtained by the Scanmar system. The equilibrium condition of the horizontal component and vertical component of forces was used to the three forces acting on the otter board in the horizontal plane. Those forces were the force on the warp at the bracket, hydrodynamic lift and drag forces on the otter board and the force on the hand rope attached just behind the otter board. Also the equilibrium of moment about the front edge of the otter board was used to find out the angle of attack of the cambered otter board. When the warp length was 120m and 180m long and the towing speed was between 1.23 and 1.90 m/s, the estimated angle of attack of the cambered otter board was ranged between
Otter board;Angle of attack;Lift;Drag;Moment;Bottom trawl
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