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首页> 外文期刊>Ocean Engineering >Parameter optimization of a double-deflector rectangular cambered otter board: Numerical simulation study
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Parameter optimization of a double-deflector rectangular cambered otter board: Numerical simulation study

机译：双偏转矩形水獭板的参数优化：数值模拟研究

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摘要

An otter board is an important device that provides a desired horizontal opening of a trawl net. A high lift-to-drag ratio is required for an otter board to maintain fishing efficiency. This study optimized the parameters of a double-deflector rectangular cambered otter board based on the maximum lift coefficient and lift-to-drag ratio and studied the hydrodynamic performance of the optimal otter board. Computational fluid dynamics (CFD) analysis was used (verified by a flume tank experiment) in the optimization process. Simulation results showed that the aspect ratios and deflectors had a significant influence on the hydrodynamic performance of an otter board. The optimal otter board had a better performance when the aspect ratio was 1.4 and the cambered ratios of the deflectors were 10%. Its maximum lift-to-drag ratio was 4.835, which was 1.10 times that of the initial otter board. The streamlines around the otter board showed that the structure of the deflectors can delay flow separation. The range of the wing-tip vortex increased with the angle of attack until stall occurred at which time the vortex began to break down.
机译：水獭板是提供拖网所需水平开口的重要设备。水獭板需要较高的升阻比才能保持捕鱼效率。本研究基于最大升力系数和升阻比，优化了双偏转矩形弧度水獭板的参数，研究了最佳水獭板的水动力性能。在优化过程中使用了计算流体动力学（CFD）分析（通过水槽实验验证）。仿真结果表明，长宽比和偏转器对水獭板的水动力性能具有显着影响。当长宽比为1.4，偏转器的弧度比为10％时，最佳水獭板的性能更好。它的最大升阻比为4.835，是初始水獭板的1.10倍。水獭板周围的流线表明，导流板的结构可以延迟流动分离。翼尖涡旋的范围随攻角的增加而增大，直到失速发生，此时涡旋开始分解。

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  • 来源
    《Ocean Engineering》 |2018年第15期|108-116|共9页
  • 作者

    Xu Qing Chang; Feng Chun Lei; Huang Liu Yi; Xu Ji Qiang; Wang Lei; Zhang Xun; Liang Zhen Lin; Tang Yan Li; Zhao Fen Fang; Wang Xin Xin; Cheng Hui;

  • 作者单位

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

    Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China;

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

    Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China;

    Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China;

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

    Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Otter board; Numerical simulation; Optimization design; Hydrodynamic performance;

    机译：水獭板;数值模拟;优化设计;水动力性能;

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