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Numerical investigation on the wave interferences of submerged bodies operating near the free surface
International Journal of Naval Architecture and Ocean Engineering ( IF 2.3 ) Pub Date : 2021-02-04 , DOI: 10.1016/j.ijnaoe.2021.01.002
Dong Li , Qun Yang , Lin Zhai , Zhen Wang , Chuan-lin He

A key factor that governs the wave interferences of a submerged body is the dimensionless Froude number. Computational Fluid Dynamics (CFD) is used to describe the resistance force coefficients and the generated waves of two SUBOFF submarine models. Grid independence studies are performed on two cases, totally and shallowly submerged cases, with four sets of computing meshes. The highest peaks are marked by red points at given wavelengths, a line is fitted to those points with a least-squares approximation, and the half wake angle at multiple Froude numbers is defined between the fitted line and the centerline of the free surface. The results show that when the depth of the target is 1.1D, constructive interferences occur at Fn = 0.3 and 0.5, while destructive interference occurs at Fn = 0.35 with distortion of the waveform. The half wake angle is less than 19.47° because of the interference between the bow and stern wave systems.



中文翻译:

在自由表面附近工作的潜水器的波干扰的数值研究

控制淹没物体的波干扰的关键因素是无量纲的弗劳德数。计算流体动力学(CFD)用于描述两个SUBOFF潜艇模型的阻力系数和所产生的波。网格独立性研究是在两种情况下进行的,这两种情况是完全的和浅水淹没的情况,具有四组计算网格。最高峰由给定波长处的红点标记,一条线以最小二乘法近似拟合到这些点,并且在拟合线和自由表面的中心线之间定义多个弗洛德数的半尾波角。结果表明,当目标深度为1.1D时,在波形失真的情况下,在Fn = 0.3和0.5时会发生相长干涉,而在Fn = 0.35时会发生相消干涉。

更新日期:2021-02-04
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