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基于CFD的带呆木船舶尾部流场分析
CFD based numerical analysis of the wake flow of a ship fitted with a deadwood
饶志强1,2, 魏波1, 樊涛1, 胡天翔1, 朱伯华1, 吕江3, 郭兴乾4
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作者单位:1. 江南造船(集团)有限责任公司,上海 200219;
2. 上海交通大学 机械与动力工程学院,上海 200240;
3. 中国船舶科学研究中心,江苏 无锡214082;
4. 中国船舶与海洋工程设计研究院,上海 200011
中文关键字:船舶;呆木;尾流;泄出涡;CFD
英文关键字:ship; deadwood; wake flow; shedding vortex; CFD
中文摘要:为了研究船舶呆木附近流场特性,本文采用计算流体力学方法研究了一艘带呆木的船舶尾部流场。数值仿真首先分析了直航状态下的尾部呆木压力分布和呆木泄出涡形态,然后分析了回转状态下的泄出涡特征。研究表明呆木末端是全船压力最低点,在高速直航时有明显的泄出涡产生,而回转状态下泄出涡大幅减弱或消失。船舶直航时呆木泄出涡存在空化的可能,在船舶设计中不能忽略。
英文摘要:In this paper CFD based numerical simulations are carried out to study the wake flow characteristics of the deadwood fitted on a ship. Firstly, pressure distribution and shedding vortex shape around deadwood under the condition of straight sailing are simulated. Then the vortex characteristics of the shedding vortex under the turning around condition are compared. The study shows that the deadwood is the region of lowest pressure on the hull surface. And obvious shedding vortex occurs when the ship has a working condition of straight sailing. Under the turning around condition, shedding vortex is much weaker than those of straight sailing. The vortex shedding from deadwood has possibilities of cavitation, which should not be ignored in ship design.
2021,43(10): 25-28 收稿日期:2020-11-02
DOI:10.3404/j.issn.1672-7649.2021.10.006
分类号:U661.1
作者简介:饶志强(1986-),男,工程师,主要从事船型开发工作
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