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<p>The operation of the autonomous underwater vehicles (AUVs) near the free water surface is a difficult technical task. For navigation to be safe, the AUV must be reliably stabilized in all modes of movement at a small depth. The vertical lift force and the trimming moment are known to provide the greatest operational value at a small depth and decrease with increasing submergence. The water depth can have a significant impact on the hydrodynamic characteristics of the vehicle. In this study, the effect of water depth on the movement of a submerged body is analyzed. The model was towed in an experimental tank. The magnitude of the relative vertical displacement of a submerged body arising under the influence of the lift force was defined experimentally, and trim angles were determined depending on the velocity and water depth. The ANSYS 19 R2 Academic Research software package allowed us to analyze the influence of the hydrodynamic pressure field forming around the body on the nature of wave formation. The nature of the change in the dependency of the wave resistance coefficient, lift force, and trimming moment on the water depth were determined. It was shown that a decrease in water depth leads to an increase in the values of the studied parameters and the hydrodynamic characteristics of the body.</p>

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Effect of water depth on the movement of a submerged body at shallow depth

  • 期刊论文

  • 发表日期：

    2025年3月7日

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  • Alexey Vasilyev,
  • Vitaly Zemlyak,
  • Victor Kozin

摘要

The operation of the autonomous underwater vehicles (AUVs) near the free water surface is a difficult technical task. For navigation to be safe, the AUV must be reliably stabilized in all modes of movement at a small depth. The vertical lift force and the trimming moment are known to provide the greatest operational value at a small depth and decrease with increasing submergence. The water depth can have a significant impact on the hydrodynamic characteristics of the vehicle. In this study, the effect of water depth on the movement of a submerged body is analyzed. The model was towed in an experimental tank. The magnitude of the relative vertical displacement of a submerged body arising under the influence of the lift force was defined experimentally, and trim angles were determined depending on the velocity and water depth. The ANSYS 19 R2 Academic Research software package allowed us to analyze the influence of the hydrodynamic pressure field forming around the body on the nature of wave formation. The nature of the change in the dependency of the wave resistance coefficient, lift force, and trimming moment on the water depth were determined. It was shown that a decrease in water depth leads to an increase in the values of the studied parameters and the hydrodynamic characteristics of the body.