CAJ | 학술논문

建模研究了F35隐身战斗机的红外辐射特性。根据隐身飞机的结构、材料等数据，建立了隐身飞机和发动机的三维模型。通过流场仿真计算得到飞机机体的温度场，尾焰的温度场、压力场以及气体组分浓度场。利用高温气体数据库HITEMP，建立尾焰的窄谱带辐射模型，计算了尾焰气体沿视线的光谱透过率，获得了尾焰的光谱亮度数据及亮度分布图像。建立了尾喷口和蒙皮的辐射模型，获得了飞机各方位角光谱辐射特性及辐射强度数据，计算结果表明由于发动机推力显著增加隐身战斗机红外辐射特性依然比较明显。最后生成了F35隐身战斗机在中波波段的红外序列图像，可用于红外成像制导武器研制中的数字仿真和半实物仿真。
건모연구료F35은신전두궤적홍외복사특성。근거은신비궤적결구、재료등수거，건립료은신비궤화발동궤적삼유모형。통과류장방진계산득도비궤궤체적온도장，미염적온도장、압력장이급기체조분농도장。이용고온기체수거고HITEMP，건립미염적착보대복사모형，계산료미염기체연시선적광보투과솔，획득료미염적광보량도수거급량도분포도상。건립료미분구화몽피적복사모형，획득료비궤각방위각광보복사특성급복사강도수거，계산결과표명유우발동궤추력현저증가은신전두궤홍외복사특성의연비교명현。최후생성료F35은신전두궤재중파파단적홍외서렬도상，가용우홍외성상제도무기연제중적수자방진화반실물방진。
Modeling infrared radiation characteristics of F35 stealth fighter is presented in this paper. The 3D models of airframe and plume are built based on structure and material data of the stealth fighter. Simulating and caclulating the flow field for airframe and turbofan engine. A temperature field for the skin, a temperature field, a pressure filed and a concentration field of gas species for the plume is caculated. A statistical narrow-band model is constructed with the High-Temperature Molecular Spectroscopic Database(HITEMP). Spectral transmissivity along the LOS are calculated, and the spectral radiance and radiance image of the plume are got. Spectral radiation characteristics and radiation intensity of the whole plane on different azimuth is got after modeling the radiation of nozzle and skin. It is showed that the infrared radiation of the stealth fighter is still powerful, which is caused by the powerful turbofan of the fighter. The infrared image sequences of F35 stealth fighter on the MWIR waveband are generated, which can be used for digital simulation and hardware-in-the-loop simulation for infrared imaging guided weapons development.