摘要
研究入水问题对导弹和鱼雷等的外形设计和弹道设计问题。水中兵器在入水初期要遭受巨大的冲击载荷形成入水空泡．而高速入水时自然空泡与入水空泡同时存在．造成高速入水载荷预测和空泡形态的预测变得十分困难。为解决上述问题，采用软件FLUENT框架，利用动网格技术和UDF方法实现了柱体高速入水流场的数值仿真，利用三相Mixture模型，建立了柱体回转体高速入水冲击的数值模拟方法，并研究了50～100m／s速度范围内入水冲击载荷特性与形成机理以及入水空泡发展规律．得到了速度对人水冲击载荷与空泡特性的影响规律。
The water entry problem of the rotary has enormous influence on the shape and trajectory design of the torpedo and missile. An underwater weapon will undergo stronger impact when being in the incipient transient process of the entry-water, and the water-entry cavity is formed. In the high-speed condition, there is water-entry cavity as well as natural cavity, so the forecast of the water-entry and cavity become much more difficult. In this paper, a nu- merical simulation method of the vertical water-entry at high speed for a cylinder model was established using the technologies of dynamic mesh, user-define-function （UDF） and mixture model based on the commercial software Fluent. The water-entry impact and cavity shape of cylinder with the velocity in 50m/s-100m/s were studied, and the influence of the velocity on water-entry impact and cavity shape were concluded.
出处
《计算机仿真》
CSCD
北大核心
2014年第3期29-33,82,共6页
Computer Simulation
基金
国家自然基金(11172241)
关键词
高速入水
冲击载荷
空泡形态
计算流体力学
Water-entry at high speed
Impact
Cavity shape
Computational fluid dynamics （CFD）
