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Hydrodynamic characteristics of the double-winged otter board in the deep waters of the Mauritanian Sea

  • Aquaculture and Fisheries
  • Published:
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Abstract

In this paper, we tested the hydrodynamic characteristics of a new, double-winged otter board that consists of a forewing, a leading edge slat and a trailing edge flap. Flume experiments were conducted in a circulating flume tank by using a model with an aspect ratio (AR) of 0.85 and a horizontal planform area (S) of 0.09 m2. The results indicated that the critical angle (αcr) of the model was 44°, whereas the maximum lift coefficient (CLmax) was up to 1.715, and the door efficiency (K) was 1.122. The attack angle (α) ranged from 30° to 48° and from 10° to 46° when the lift coefficient (CL) and door efficiency (K) were greater than 1.2 and 1.0, respectively. To compare the difference between double-winged otter board and traditional Morgere Polyvalent Ovale, same model of Morgere Polyvalent Ovale was also tested under the same experimental conditions. The critical angle (αcr) and maximum of lift coefficient (CLmax) of the doublewinged otter board were 37.5% and 14.6% larger than those of the Morgere Polyvalent Ovale. Therefore, we concluded that the novel, double-winged otter board was more suitable for bottom trawling fisheries in the deep water of the Mauretania Sea due to its better hydrodynamic characteristics and stability.

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Authors and Affiliations

  1. College of Fisheries, Guangdong Ocean University, Zhanjiang, 524088, China

    Xin Su  (宿鑫), Huosheng Lu  (卢伙胜), Bo Feng  (冯波), Qiujie Chen  (陈秋杰) & Yunrong Yan  (颜云榕)

  2. Center of South China Sea Fisheries Resources Monitoring and Assessment, Guangdong Ocean University, Zhanjiang, 524088, China

    Huosheng Lu  (卢伙胜), Bo Feng  (冯波) & Yunrong Yan  (颜云榕)

  3. Guangdong Provincial Engineering and Technology Research Center of Far Sea Fisheries Management and Fishing of South China Sea, Guangdong Ocean University, Zhanjiang, 524088, China

    Huosheng Lu  (卢伙胜), Bo Feng  (冯波) & Yunrong Yan  (颜云榕)

Authors
  1. Xin Su  (宿鑫)
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  2. Huosheng Lu  (卢伙胜)
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  3. Bo Feng  (冯波)
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  4. Qiujie Chen  (陈秋杰)
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  5. Yunrong Yan  (颜云榕)
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Corresponding author

Correspondence to Yunrong Yan  (颜云榕).

Additional information

Supported by the Technological Research on Reforming Otter Boards of Bottom Trawl in Mauretania and Guinea (China National Fisheries Corporation, CNFC), Technological Research on Transformation and Upgrading of Shrimp Trawl in Sierra Leone (CNFC), Far Sea Fisheries Resources Monitoring and Assessment of South China Sea (No. 2013050212)

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Su, X., Lu, H., Feng, B. et al. Hydrodynamic characteristics of the double-winged otter board in the deep waters of the Mauritanian Sea. J. Ocean. Limnol. 36, 1417–1424 (2018). https://doi.org/10.1007/s00343-018-7047-3

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  • DOI: https://doi.org/10.1007/s00343-018-7047-3

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