﻿ 基于Fluent的船体界面阻力分析
 舰船科学技术  2016, Vol. 38 Issue (5): 35-38 PDF

Study of hull interface resistance based on FLUENT
XIONG Yi-chao, YUAN Cheng-qing
Reliability Engineering Institute, School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
Abstract: Hull interface resistance was calculated by FLUENT simulation analysis.VOF method was used to simulate the hull in two phases of air and water movement, and the relationships of different speed hull friction and residual resistance was studied. Considering the influence of block coefficient on resistance, simulating in fluent by establishing multiple models of different block coefficient, concluded the relationship between resistance and hull block coefficient when the Froude Number of a certain time, get the relatively optimized ship resistance. This method is more accurate modeling which can provide more evidence for the hull lines of drag reduction.
Key words: FLUENT     GAMBIT     ship resistance     block coefficient
0 引言

1 计算模型 1.1 模型的建立和网格划分

 图 1 计算域 Fig. 1 Computational domain

 图 2 船体局部面网格 Fig. 2 Local surface meshes on the hull
1.2 边界条件的设定

 图 3 船体气液两相分布图 Fig. 3 Hull gas-liquid two-phase distribution
2 计算结果分析 2.1 船体在不同航速下的 Fluent 分析

2.2 基于 Fluent 分析船体形状对于阻力的影响

3 结语

1）在一定速度范围内，随着船速的增加，基本阻力非线性增大，且当船速较低时，基本阻力增大较为缓慢，船速较高时，基本阻力显著增大。船速较低时，摩擦阻力占基本阻力的绝大部分，随着船速的提高，则压差阻力占的百分数将越来越大。

2）速度不变即傅汝德数 Fn不变的情况下，在一定方形系数范围内，随着方形系数的增大，船体单位排水量的摩擦阻力和单位排水量的压差阻力均呈非线性增大。且船舶方形系数对船体摩擦阻力影响较小，但对船体的压差阻力影响较大。

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