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A Comparative Study on Hydrodynamic Performance of Double Deflector Rectangular Cambered Otter Board

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Abstract

In the present work, the hydrodynamic performance of the double deflector rectangular cambered otter board was studied using wind tunnel experiment, flume tank experiment and numerical simulation. Results showed that the otter board had a good hydrodynamic performance with the maximum lift-to-drag ratio (KMAX = 3.70). The flow separation occurred when the angle of attack (AOA) was at 45°, which revealed that the double deflector structure of the otter board can delay the flow separation. Numerical simulation results showed a good agreement with experiment ones, and could predict the critical AOA, which showed that it can be used to study the hydrodynamic performance of the otter board with the advantage of flow visualization. However, the drag coefficient in flume tank was much higher than that in wind tunnel, which resulted in a lower lift-to-drag ratio. These may be due to different fluid media between flume tank and wind tunnel, which result in the big difference of the vortexes around the otter board. Given the otter boards are operated in water, it was suggested to apply both flume tank experiment and numerical simulation to study the hydrodynamic performance of otter board.

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Acknowledgements

The present work was supported by the National Key Technology R&D Program (No. 2013BAD13B03), the Key R&D Project from Science and Technology Department of Zhejiang Province (Nos. 2018C02026, 2018C 02040), the National Natural Science Foundation of China (No. 31072246) and the Fundamental Research Funds for the Central Universities (No. 201564020).

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Authors and Affiliations

  1. College of Fisheries, Ocean University of China, Qingdao, 266003, China

    Qingchang Xu, Liuyi Huang, Jiqiang Xu, Zhenlin Liang, Yanli Tang, Fenfang Zhao & Xinxin Wang

  2. East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200090, China

    Chunlei Feng, Lei Wang & Xun Zhang

  3. Marine College, Shandong University, Weihai, 264209, China

    Zhenlin Liang

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  1. Qingchang Xu
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  2. Chunlei Feng
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  3. Liuyi Huang
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  4. Jiqiang Xu
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  5. Lei Wang
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  6. Xun Zhang
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  7. Zhenlin Liang
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  8. Yanli Tang
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  9. Fenfang Zhao
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  10. Xinxin Wang
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Correspondence to Liuyi Huang.

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Xu, Q., Feng, C., Huang, L. et al. A Comparative Study on Hydrodynamic Performance of Double Deflector Rectangular Cambered Otter Board. J. Ocean Univ. China 17, 1218–1224 (2018). https://doi.org/10.1007/s11802-018-3627-2

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  • DOI: https://doi.org/10.1007/s11802-018-3627-2

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