四波段飞机尾焰红外辐射的数值计算与图像仿真  

Numerical Calculation and Image Simulation for Infrared Radiation of Four-Band Aircraft Tail Flame

作　　者：王昭 王玲芳[1] 孙豹[1] Wang Zhao;Wang Lingfang;Sun Bao(Key Laboratory of the Ministry of Education for Optical Fiber Sensing and Communication, University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学光纤传感与通信教育部重点实验室,成都611731

出　　处：《航空兵器》2018年第6期90-94,共5页Aero Weaponry

基　　金：航空科学基金实验室类项目(20150180001)

摘　　要：通过对喷气式飞机尾焰流场特点的深入分析,绘制了尾焰的等温线图和各组分分压图。在深入对比和分析几种红外辐射计算方法后,确定选择精度较高的模型逐线积分算法。同时对HITRAN数据库提供的光谱谱线参数进行外推,得到在尾焰物理参数下的辐射计算数据,进而得到尾焰气体的吸收参数和辐射参数。综合得到的辐射参数,求解C-G谱带模型所给出辐射传输方程。最终,计算得到某喷气式飞机在非加力状态下,1. 8～2. 6μm,3. 0～4. 1μm,4. 1～5. 0μm,7. 7～9. 5μm波段内,沿特定视线方向上的尾焰红外辐射。根据计算得到的辐射结果,利用图形引擎OGRE仿真四波段的红外图像及添加大气效应后的变化。Based on the analysis of the tail flame flow characteristics of the jet aircraft,the temperature distribution and pressure distribution of the tail flame flow field are obtained.Through analysis and comparison of several radiation parameters,the line-by-line method with the higher precision is selected.Based on the HITRAN database,the spectral absorption coefficients of carbon dioxide and water vapor are calculated.The radiative transfer equation of the Curtis-Godson band model is solved by combining the obtained radiation parameters.Finally,the infrared radiation brightness of the tail flame in four infrared bands(1.8~2.6μm,3.0~4.1μm,4.1~5.0μm,7.7~9.5μm)at different angles is calculated.Based on the calculated radiation results,the four-band infrared images and changes after adding atmospheric effects are simulated by using graphics engine OGRE.

关 键 词：红外辐射 尾焰 HITRAN 逐线积分法 粒子系统 大气效应 

分 类 号：TJ765.43[兵器科学与技术—武器系统与运用工程] V235.11[航空宇航科学与技术—航空宇航推进理论与工程]