CAJ | 학술논문

建立了飞机机体红外辐射强度的计算模型。在综合考虑气动对流作用、环境辐射、内热源加热、蒙皮热传导等因素的基础上建立了热网络方程，由此导出壁面热流密度函数，并将其作为浮动的热边界条件，通过机体外流场的数值计算得到了机体表面的温度分布，并计算得出不同视线方向上、不同波段的机体总体红外辐射强度，在计算视线上的机体总辐射时考虑了面元之间的遮挡，最后讨论了太阳辐射、飞行速度、飞行高度对飞机机体红外辐射的影响。
건립료비궤궤체홍외복사강도적계산모형。재종합고필기동대류작용、배경복사、내열원가열、몽피열전도등인소적기출상건립료열망락방정，유차도출벽면열류밀도함수，병장기작위부동적열변계조건，통과궤체외류장적수치계산득도료궤체표면적온도분포，병계산득출불동시선방향상、불동파단적궤체총체홍외복사강도，재계산시선상적궤체총복사시고필료면원지간적차당，최후토론료태양복사、비행속도、비행고도대비궤궤체홍외복사적영향。
The calculation model of airframe’s infrared radiation was established. Based on the factors of aerody-namic heat convection,environmental radiation,internal heat source’s radiation and heat conduction on air-craft’s skin,the thermal network equation was established,a wall heat flux function was derived as a flexible thermal boundary condition,and airframe’s temperature distribution was obtained by numerical calculation of airframe’s ex-ternal flow field. Then the total infrared radiation intensity of airframe with different gazing directions and different wavelength was calculated. The obstruction between skin cells is considered when the airframe’s total radiation on the line of sight is calculated. Finally,the effect of sun radiation,flight speed and flight altitude on airframe’s IR ra-diation is discussed.