隐身飞机尾焰的红外辐射特性

隐身飞机尾焰的红外辐射是隐身飞机探测的主要辐射源.本文提出了一种新的隐身飞机尾焰红外辐射特性计算模型.该模型以普通飞机尾焰红外辐射特性计算模型为基础,进而考虑红外隐身措施的影响,间接实现隐身飞机尾焰的红外辐射特性的计算.计算模型分别考虑了隐身飞机的二元喷口、引射技术、红外遮蔽云以及遮挡对尾焰辐射的影响.计算结果得出,添加隐身措施后尾焰辐射强度仅为添加前辐射强度的5.8%.针对隐身飞机尾焰红外辐射特性很难获取的问题,将计算结果与喷灯燃烧航空煤油的光谱峰位数据进行了比较,实验结果显示隐身前后辐射能量量级变化与国外文献相同,表明该模型可以用于隐身飞机尾焰红外辐射特性计算.

Infrared Radiation Characteristics of the Stealth Aircraft

The infrared radiation characteristics of the plume of stealth aircraft are the key radiation resource for stealth aircraft detection.A new model was presented to calculate the infrared radiation of a stealth aircraft.Based on the model of the normal aircraft,the new model introduced the infrared radiation suppression module to describe the effect of infrared suppression technology.In order to test the feasibility of the model,for the lake of data,the new model was applied to calculate the infrared radiation of plume of the normal aircraft and stealth aircraft.The new model considered the impact of the 2D-nozzle plume,ejection,infrared obscure cloud and blocking on plume radiation of stealth aircraft.The calculation results show that plume radiation add stealth measures is the 5.8% of not added.Compared the calculation results with the reference results and tested spectrum data of the combustion of the aviation kerosene,it was found that the magnitude change in radiation energy is the same as the references,so the new model can be used for calculating infrared radiation of the plume of stealth aircraft.