回转体超音速入水冲击数值仿真

孙 凯; 党建军; 郝维敏; 蒋 彬

doi:10.11993/j.issn.1673-1948.2015.01.001

回转体超音速入水冲击数值仿真

doi: 10.11993/j.issn.1673-1948.2015.01.001

西北工业大学航海学院, 陕西西安, 710072

详细信息

作者简介:
孙凯(1989-), 男, 在读硕士, 主要研究方向为水下航行器设计.

中图分类号: TJ630.1
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- 被引次数: 0
出版历程
- 收稿日期: 2014-11-17
- 修回日期: 2014-12-08
- 刊出日期: 2015-02-20

Numerical Simulation on Vertical Water Entry Impact of Axisymmetric Body at Supersonic Speed

School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an 710072, China

摘要

摘要: 入水冲击问题是现代水中兵器的研究热点之一。采用商用CFD软件, 使用流体体积函数(VOF)模型并结合动网格技术, 仿真了平头回转体模型在亚音速、跨音速以及超音速状态下的入水过程, 得到了模型在不同速度下的入水阻力特性、头部直径、液体可压缩性及空气激波对入水过程的影响。仿真结果表明, 入水阻力系数峰值随着速度的增加先降低后平缓, 峰值宽度逐渐降低; 增大头部直径, 阻力系数峰值增加, 峰值宽度增加; 水的压缩性会使阻力系数峰值出现的时间延后, 数值降低; 空气激波会使接触水面时刻阻力系数降低。
- 平头回转体 /
- 入水过程 /
- 流体体积函数(VOF)模型 /
- 阻力系数
Abstract: Water entry impact is one of the hot topics in the modern underwater weapons research. With the volume of fluid (VOF) model and dynamic mesh in commercial CFD software, the water entry processes of an axisymmetric body with flat top are simulated at subsonic, transonic and supersonic speeds, respectively. The drag coefficient, head diame-ter, water compressibility and the effect of air shock wave on the water entry processes of the simulated model are ac-quired at three different speeds. Simulation results show that: 1) with the increase of speed, the peak value of drag coef-ficient first decreases then remains stable in the end, and the width of peak value decreases gradually; 2) the peak value and its width of drag coefficient increases with the increase in head diameter; 3) the water compressibility delays the appearance of the peak value of drag coefficient and reduces the peak value; and 4) air shock wave reduces the value of drag coefficient at water surface.
- axisymmetric body /
- water entry process /
- volume of fluid(VOF) model /
- drag coefficient

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参考文献(6)

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