海底沙波对潜器水动力性能的影响

Influence of seabed sand wave on hydrodynamic performance of submersible

    摘要
  • 摘要:
      目的  研究潜器在海底沙波地形干扰下的水动力特性。
      方法  基于计算流体力学（CFD）方法，使用STAR-CCM+软件并结合重叠网格方法对潜器经过海底沙波的过程进行模拟，计算潜器阻力系数和升力系数在此过程中的变化。
      结果  结果表明，当潜器近海底航行时，沙波地形会对潜器产生一定的干扰，当艏部运动至波峰附近时，负升力出现最大值，当艉部运动至波峰附近时，阻力出现最大值；在不同航速下，潜器表面压力分布规律的不同会导致升力系数的变化规律不同；随着近海底距离的减小，海底沙波对潜器阻力和升力变化影响显著，当H/D > 5时，海底沙波对潜器阻力和升力的影响可以忽略。
      结论  所做研究可为潜器的安全及操纵性能提供一定的参考。

     

    Abstract:
      Objectives  This paper studies the hydrodynamic characteristics of submersible under the interference of seabed sand wave topography.
      Methods  Based on the computational fluid dynamics (CFD) method, the process of submersible passing above a seabed sand wave is simulated in the STAR-CCM+ software using the overset grid method, and the evolution of the resistance coefficient and lift coefficient during the process is calculated.
      Results  The results show that when the submersible navigates near the seabed, interaction forces act on it. When the bow moves near the wave crest, the maximum negative lift occurs, and when the stern moves near the crest, the maximum resistance occurs. The different surface pressure distribution rules of submersible at different speeds lead to different evolution rules of the lift coefficient. The smaller the H/D, the more significant the influence of the seabed sand wave on the resistance and lift force of the submersible. When H/D > 5, the influence of the seabed sand wave on the resistance and lift force of the submersible can be ignored.
      Conclusions  The results of this study provide valuable references for the safety and maneuverability of submersibles.

     

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