高温激波层CO_(2)辐射与传输特性数值计算研究  

A numerical study of carbon dioxide radiation and transmission property in high temperature shock layer

作　　者：庞明琪 刘海峥[2,3,4] 张代军[2,3,4] 史泽林[1,2,3,4] Pang Mingqi;Liu Haizheng;Zhang Daijun;Shi Zelin(Department of Automation,University of Science and Technology of China,Hefei 230027,China;Key Laboratory of Opto-Electronic Information Processing,Chinese Academy of Sciences,Shenyang 110016,China;Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,China)

机构地区：[1]中国科学技术大学自动化系,安徽合肥230027 [2]中国科学院光电信息处理重点实验室,辽宁沈阳110016 [3]中国科学院沈阳自动化研究所,辽宁沈阳110016 [4]中国科学院机器人与智能制造创新研究院,辽宁沈阳110169

出　　处：《红外与激光工程》2022年第4期160-169,共10页Infrared and Laser Engineering

基　　金：中国科学院国防重点实验室基金(CXJJ-16 S027)。

摘　　要：CO_(2)是中、短波红外探测的主要辐射噪声源,目前针对高温CO_(2)辐射和传输特性的研究尚不明晰。重点研究了激波层中CO_(2)的吸收作用,并对CO_(2)热辐射及光敏面各辐射分量占比进行了计算与分析。采用改进的切线平板法求解辐射传输方程,并考虑了目标与窗口辐射对激波层内辐射场分布的影响,据此推导了激波层红外辐射和传输特性计算模型,最后给出了探测器光敏面各辐射分量及占比计算模型。对某型超声速红外制导导弹飞行高度h=1 km、飞行速度Ma=3~5时激波层特性进行仿真计算,结果表明:中波波段激波层透过率低于短波波段,但总体来说可忽略激波层吸收作用;飞行速度增加导致CO_(2)辐射噪声区间向长波方向拓宽,Ma≥4、h=1 km时,4.4μm以上波段有严重的CO_(2)辐射噪声淹没目标信号,截止波长为4.4μm的滤波器无法适用。CO_(2)is the main source of radiation noise in mid-infrared and short-infrared detection.The research on radiation and transmission property of CO_(2)at high temperature is still not clear at present.The absorption effect of CO_(2)in the shock layer was mainly studied,and the thermal radiation of CO_(2)and radiation componen proportion on the photosensitive surface were analyzed and calculated.The improved tangent-slab approximation method was used to solve the radiative transport equation,and the influences of target and window radiation on the radiation field distribution in the shock layer were considered.Based on this,the radiation and transmission property of shock layer were deduced.Finally,the calculation model of each radiation component and proportion of the photosensitive surface was given.The property of the shock layer of a supersonic missile at an altitude of h=1 km and flight speed of Ma=3-5 was simulated and calculated.The results showed that the transmittance of shock layer in mid-wave bands is lower than that in short-wave band,but shock layer absorption can be ignored in general.The increase of flight speed leads to a broadening of the CO_(2)radiated noise region to the long-wave direction,and the target signal is submerged seriously by CO_(2)radiation noise in the band above 4.4μm under condition of Ma≥4 and h=1 km,the filter with a cutoff wavelength of 4.4μm is not suitable.

关 键 词：超声速 高温激波 辐射传输 辐射噪声 

分 类 号：TN215[电子电信—物理电子学]