基于瞬态球状热斗篷的地下浅层目标红外隐身技术研究

由于浅层地下目标与背景土壤的热物性不同，影响了整个区域表面的温度场分布，容易被敌方探测系统发现并击毁。针对这一问题，考虑太阳辐射、天空辐射以及风速的影响，本文建立了埋藏地下目标的区域温度分布传热模型，揭示了不同时段埋藏地下目标对区域表面温度场的影响。在变换热力学的基础上，通过坐标变换的方法，推导出球状瞬态热斗篷的导热系数的通解表达式；根据等效介质理论，对设计的热物性参数进行均质化，并通过数值实验方法验证了基于热斗篷地下目标红外隐身技术的可行性。

Research on infrared stealth technique for subsurface target based on transient spherical thermal cloak

Because of the difference of thermal physical properties between subsurface target and the soil, the temperature field distribution on the surface of the whole soil area is influenced and the target is easily detected and destroyed by enemy. To solve this problem, taking account of the influence of solar radiation, sky radiation and wind speed, We established heat transfer model of temperature distribution of the region containing buried target in the paper, which revealed the impact of buried target on the regional temperature field during different time. Based on the transformation thermodynamics, the thermal conductivity general expressions of spherical transient thermal cloak was derived by the means of coordinate transformation,. According to the equivalent medium theory, we homogenized the designed thermal physical parameters and verified the feasible of target infrared stealth technology based on the thermal cloak by numerical method.