摘要
为了满足舰船红外隐身的需要,分析利用过冷降膜对舰船壁面的红外隐身方法.建立了垂直自由降膜的数学模型及计算方法,采用有限体积法数值模拟,运用求解一维非稳态导热问题的思想,解决了二维稳态对流换热问题,求得了恒壁温及恒热流的降膜流动在不同条件下的温度分布的数值解,所求解与实验数据吻合较好.计算结果表明:增大液膜流动的流量、降低液膜入口温度或增加物体粘性均可增强对特定目标的红外抑制效果,说明了过冷降膜是一种简单有效的红外抑制技术.这种红外抑制技术可以有效减少舰船的被探测性,增强舰船的生存能力.
For the purpose of warship infrared stealth, an analytical research on a method of subcooling falling liq- uid films flowing over a plate of ship into the infrared stealth was conducted. The models of the laminar flow and the heat transfer of the subcooling films were established. A steady two dimensional convection heat transfer problem was solved by applying ways and skills for working out one-dimension unsteady state heat conduction problem and using volume of fluid method computationally. Numerical results of temperature distribution of subcooling falling liquid films were obtained with constant temperature or constant flux under different conditions, and the solution was in a- greement with experimental. The computational results indicate that the infrared stealth effect can be enhanced by increasing the flow rate of liquid films or dropping the inlet temperature of liquid films or increasing liquid viscosity, itg showed that the subcooling films technology is simple and effective in the suppressing of the infrared signature of military targets. Through infrared signature suppression technology, a warshipg detectability can be dramatically re- duced, improving its chance of survival.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2013年第2期131-136,共6页
Journal of Harbin Engineering University
基金
国防预研资助项目(101050202)
关键词
竖壁液膜
过冷液膜
温度分布
有限体积法
红外抑制技术
vertical liquid film
subcooling films
temperature distribution
VOF
infrared suppression technology
