CAJ | 학술논문

红外成像制导导弹在大气层内超音速飞行时光学头罩外存在激波层，为不均匀的高温气体介质。由其产生的热辐射将降低探测器信噪比，使红外图像发生畸变。为计算激波层红外辐射特性，首先采用Fastran流体分析软件实现球头外部流场的数值模拟，通过逐线计算法细致计算了外部绕流气体辐射特性，并模拟辐射传输过程，进而得到气体与光学头罩交界面上气体向光学头罩的光谱辐射亮度以及积分辐射亮度。
홍외성상제도도탄재대기층내초음속비행시광학두조외존재격파층，위불균균적고온기체개질。유기산생적열복사장강저탐측기신조비，사홍외도상발생기변。위계산격파층홍외복사특성，수선채용Fastran류체분석연건실현구두외부류장적수치모의，통과축선계산법세치계산료외부요류기체복사특성，병모의복사전수과정，진이득도기체여광학두조교계면상기체향광학두조적광보복사량도이급적분복사량도。
When supersonic flying inside aerosphere, the shock layer of imaging IR missiles is highly uneven gas medium. Its aerothermal radiation effects degrade and distort the remote sensing images of infrared sensors. In this paper, the numerical simulation of external flow field is achieved by Fastran, and the field is calculated exactly by line-by-line method. Moreover, radiative transfer process is simulated, and the spectral radiance and integral radiance of interface between gas and dome are calculated.