TY - GEN
T1 - Analysis and optimization on the hydrodynamic performance of hollow otter board in antarctic krill trawl
AU - Huang, Liuyi
AU - Li, Yuyan
AU - Jia, Mingxiu
AU - Wang, Gang
AU - Feng, Chunlei
AU - Zhao, Fenfang
AU - Xu, Qingchang
AU - Cheng, Hui
N1 - Publisher Copyright:
© 2020 by the International Society of Offshore and Polar Engineers (ISOPE).
PY - 2020
Y1 - 2020
N2 - Hollow rectangular camber otter board was mainly adopted in low-speed trawl systems in Antarctic krill fisheries. In this study, hydrodynamic analyses were performed on a hollow rectangular camber otter board with a projected area of 13.02 square meters, an aspect ratio (AR) of 1.66 and a relative camber of 10%. First, A flume tank experiment was used to validate the accuracy of numerical simulation. Then, the effects of aspect-ratio, relative camber on hydrodynamic characteristics of the hollow rectangular otter board were investigated by Computational Fluid Dynamics (CFD) simulations. According to the numerical results, (1) lift coefficient (CL) and lift-drag ratio (K) first increased and then decreased with the increasing angle of attack (AOA); (2) the maximum CL and K were obtained with when AOA=25°and 5°, respectively; (3) CL slowly increased and drag coefficient (CD) slowly decreased with increasing AR. (4) CL quickly increased and CD slowly increased with increasing relative camber; (5) K increased with increasing AR; (6) K increased first and then decreased with the increasing relative camber. At last, low CD, high CL and high K were selected as the targets for optimization, aiming to improve the working efficiency of otter board. The optimization indicated that when the AR was 2.06 and the relative camber was 10%, the otter board has the optimal working efficiency. This research has provided the scientific reference for the pre-design and optimization of the hollow high AR otter board.
AB - Hollow rectangular camber otter board was mainly adopted in low-speed trawl systems in Antarctic krill fisheries. In this study, hydrodynamic analyses were performed on a hollow rectangular camber otter board with a projected area of 13.02 square meters, an aspect ratio (AR) of 1.66 and a relative camber of 10%. First, A flume tank experiment was used to validate the accuracy of numerical simulation. Then, the effects of aspect-ratio, relative camber on hydrodynamic characteristics of the hollow rectangular otter board were investigated by Computational Fluid Dynamics (CFD) simulations. According to the numerical results, (1) lift coefficient (CL) and lift-drag ratio (K) first increased and then decreased with the increasing angle of attack (AOA); (2) the maximum CL and K were obtained with when AOA=25°and 5°, respectively; (3) CL slowly increased and drag coefficient (CD) slowly decreased with increasing AR. (4) CL quickly increased and CD slowly increased with increasing relative camber; (5) K increased with increasing AR; (6) K increased first and then decreased with the increasing relative camber. At last, low CD, high CL and high K were selected as the targets for optimization, aiming to improve the working efficiency of otter board. The optimization indicated that when the AR was 2.06 and the relative camber was 10%, the otter board has the optimal working efficiency. This research has provided the scientific reference for the pre-design and optimization of the hollow high AR otter board.
KW - Aspect ratio
KW - Flume tank experiment
KW - Hollow otter board
KW - Hydrodynamic performance
KW - Numerical simulation
KW - Relative camber
UR - https://www.scopus.com/pages/publications/85090913186
M3 - 会议稿件
AN - SCOPUS:85090913186
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 1786
EP - 1793
BT - 30th International Ocean and Polar Engineering Conference
PB - International Society of Offshore and Polar Engineers
T2 - 30th International Ocean and Polar Engineering Conference, ISOPE 2020
Y2 - 11 October 2020 through 16 October 2020
ER -