中文摘要：

以典型飞翼布局无人机为研究对象，采用流场计算商业软件和自主开发红外计算软件相结合的形式，利用离散传递法计算了全机在8—14um波段红外辐射强度分布。在红外计算过程中，考虑了发动机固体壁面的发射和反射，飞机蒙皮的发射，燃气内CO2、H20和CO吸收与发射作用。结果表明：马赫数是影响其8～14um波段红外辐射特征的重要因素之一；通过冷却、隔热等措施降低后机身发动机热影响区蒙皮的温度或者在机身蒙皮上涂敷低红外发射率材料可以明显降低飞机在8～14um波段的红外辐射特征，该研究为未来飞行器红外隐身设计提供了参考。

英文摘要：

In order to study the infrared radiation characteristics of BWB-UAV skin, infrared radiation intensity of typical stealth UAV of the 8-14 p,m band were calculated by the form of a combination of the flow field calculation commercial software and self-developed infrared computing software using the discrete transfer method. In the IR calculations, the emission and reflection of the solid wall of the engine, aircraft skin launch, gas, CO2, H20 and CO absorption and emission effects were talked into account. The results showed that： the Mach number is one of the impact factors that affecting infrared radiation characteristics on 8-14p~m band; The cooling, insulation measures that lowering the heat affected zone of the skin temperature fuselage engine or coating the infrared emissivity of materials on the fuselage skin can significantly reduce the infrared radiation characteristics of 8-14 um band. The conclusions provide a useful reference for the future aircraft infrared stealth design.