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结合CFD技术和红外辐射理论发展了一种飞机红外辐射强度估算方法。首先通过欧拉方程数值模拟来获得飞机表面温度场分布,然后应用结合粘性附面层理论进行壁面温度计算分析。在获得了飞机表面温度分布数据之后,采用灰体辐射理论估算全机红外辐射强度。进行某喷气式飞机红外辐射强度估算研究,分析有/无尾焰情况的飞机红外辐射强度计算结果,初步验证了所提出方法的可行性。所提出的红外辐射估算理论对于飞机红外隐身与高生存力设计具有一定的参考价值。
Combining CFD technology and infrared radiation theory, a method of estimating the infrared radiation intensity of aircraft has been developed. Firstly, the Euler equations are used to obtain the temperature field distribution of the aircraft surface, and then the wall surface temperature is calculated by using the theory of viscous boundary layer. After obtaining the surface temperature distribution data of the aircraft, the whole body infrared radiation intensity is estimated by using the gray body radiation theory. The estimation of the infrared radiation intensity of a jet aircraft is carried out and the calculation results of the infrared radiation intensity of the aircraft with / without tail flame are analyzed. The feasibility of the proposed method is verified preliminarily. The proposed infrared radiation estimation theory for the aircraft infrared stealth and high viability design has a certain reference value.