Infrared radiation simulation of exhaust system by coupling FVM with narrow band k-distribution  

作　　者：ZHU Xi-juan Eriqitai LI Xi-xi WANG Qiang 

机构地区：[1]School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing 100191,China

出　　处：《航空动力学报》2012年第1期25-32,共8页Journal of Aerospace Power

摘　　要：A three-dimensional infrared radiation code for exhaust system was developed by the finite volume method coupled with narrow band k-distribution in non-gray absorbing-emitting media.The final infrared signature had considered the atmosphere effect,and the simulation values were favorably consistent with testing ones.The results indicate that the relative errors considering the effect of atmosphere compared with that of the contrary condition reduce by 31%,it shows that when simulating the infrared radiation of the target which is received by the infrared detectors,even the calculation band is in atmospheric windows 3～5 μm,the effect of atmospheric transmission on infrared signature of the target should not be neglected.A three-dimensional infrared radiation code for exhaust system was developed by the finite vol- ume method coupled with narrow band k-distribution in non-gray absorbing-emitting media. The final infrared signature had considered the atmosphere effect, and the simulation values were favorably consistent with tes- ting ones. The results indicate that the relative errors considering the effect of atmosphere compared with that of the contrary condition reduce by 31%, it shows that when simulating the infrared radiation of the target which is received by the infrared detectors, even the calculation band is in atmospheric windows 3--5 μm, the effect of atmospheric transmission on infrared signature of the target should not be neglected.

关 键 词：exhaust system infrared radiation(IR) finite volume method(FVM) narrow band k-distribution atmospheric transmission 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]