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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。
The method of infrared stealth for military targets by using the supercooling and falling film technology at constant temperature is deeply analyzed. The flow and heat transfer model of laminar flow falling film was established. The temperature distribution on falling film surface was obtained by integral method, and the accuracy of solution was improved. Comparing the results of different researchers with the experimental results, it is obtained that the change of free surface temperature of liquid film is mainly caused by the relationship between the thickness of the thermal boundary layer and the thickness of the liquid film, initial temperature, liquid membrane flux and dynamic viscosity. The infrared suppression effect of the overcooling film on the military target under different parameters was calculated. The results show that the overcooling film is a simple and effective infrared suppression technology, which can increase the flow of the liquid film, reduce the temperature of the liquid film inlet or increase the object Viscosity can enhance the infrared stealth effect on a specific target, the technology in the military target infrared stealth has a bright future.