复杂边界条件下月池内流体运动性能研究

Numerical Studies on Fluid Motion in Moon Pool with Complex Boundary Conditions

月池应用于各种小型特种船舶中,它垂直贯穿甲板和船底,内置勘探设备,以声呐居多。这些设备形状通常很不规则,边界复杂,增加了求解流体运动的复杂性。流体剧烈运动产生的大量气泡干扰月池内和月池后方设备的正常工作。论文考虑内置设备对月池内流体运动的影响,用FLUENT软件中的自编程序UDF分析月池内流场的压力分布、自由液面运动与水气分布。研究发现,月池随边壁面一侧的压力高于导边壁面一侧的压力;自由液面呈现随边一侧高、导边一侧低的驻波形态;月池导边一侧自由液面水气掺混现象更为严重。

The moon pool vertically through the deck to the bottom is used in various special ships.Some exploration equipment such as sonar is in the moon pool.Generally,the equipment has irregular geometry and complex boundaries,which increase the complexity of fluid motion in the moon pool.UDF program in the software Fluent is applied to analyze pressure distribution,free surface movement and water-gas distribution in the moon pool.It is found that the pressure on one side of the wall is higher than that on another side,and the free surface is in the form of standing wave with a higher level at the leading edge and lower at the trailing edge.Phenomenon of water air mixing on the free surface at the leading edge of the moon pool is more serious.