过冷降膜的温度场及红外隐身应用研究  

Application of subcooling films in temperature field and infrared stealth technology

作　　者：彭友顺[1] 杨立[1] 杜永成[1] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033

出　　处：《红外与激光工程》2012年第10期2572-2577,共6页Infrared and Laser Engineering

基　　金：国防预研项目(101050202)

摘　　要：深入分析了利用定常温度下过冷降膜技术对军事目标进行红外隐身的方法。建立了层流降膜的流动与传热模型,采用积分法得到了降膜表面的温度分布,提高了解的精度。对比不同研究者的结果与实验值,得到了液膜自由表面温度变化主要是由热边界层厚度与液膜厚度关系、初始温度、液膜流量、动力粘度的变化引起的。计算了不同参数下过冷降膜对军事目标的红外抑制效果,结果表明:过冷降膜是一种简单有效的红外抑制技术,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隐身效果,该技术在军事目标的红外隐身方面应用前景广阔。An analytical research on a method of subcooling falling liquid films flowing over a vertical plate with constant temperature into the infrared stealth was conducted. The models of the laminar flow and the heat transfer of the subcooling films were established. The surface temperature distribution of falling liquid films was presented by applying the method of integral method, and the accuracy of solution was raised. The results of different researchers were compared with experimental results, it is found that the change of relationship between thermal boundary layer thickness and liquid films thickness, inlet temperature, the flow rate of film, liquid viscosity leads to the change of surface temperature of liquid films. The effect of the anti-infrared of the films under different factors was evaluated. The results show that the subcooling films technology is simple and effective in the suppressing of the infrared signature of military targets, and 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. The application of the subcooling films in infrared stealth in the future is bright.

关 键 词：过冷降膜 温度分布 红外隐身技术 有限体积法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]