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Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (5): 1135-1143.doi: 10.12382/bgxb.2021.0204

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Drag Reduction Characteristics of Bionic Non-smooth Surface for Underwater Vehicle

TANG Jun, LIU Yanyan, YAN Yitian   

  1. (School of Civil Engineering,Tianjin University,Tianjin 300354,China)
  • Online:2022-04-12

Abstract: In order to save energy and build high-performance vehicles,a new bionic non-smooth surface that can significantly reduce the drag of underwater vehicle is proposed based on the skin structure of killer whale.The drag reduction characteristics of non-smooth surface with different parameters are obtained through numerical simulation,and the influence of bionic non-smooth surface on near-wall flowfield and turbulence intensity is discussed. The results show that the bionic non-smooth surface can increase the turbulent boundary layer thickness in a wide range of velocities,and reduce the turbulence intensity and skin friction. In the range from 0.5 m/s to 15 m/s,the skin friction of plate with the bionic non-smooth surface is reduced by more than 9%,with a maximum total drag reduction ratio of 7.57%. By applying the bionic non-smooth surface to the SUBOFF submarine model, the maximum total drag reduction ratio of submarine achieves 11.31%. The new bionic non-smooth surface has a wide range of application,which can effectively reduce the total drag of underwater vehicles and has good prospects for engineering applications.

Key words: underwatervehicle, bionicnon-smoothsurface, killerwhale, SUBOFFsubmarine, dragreduction

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