| 小偏距S弯二元喷管的红外辐射特性数值分析 |
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| 引用本文： | 于明飞,吉洪湖,李宁,王浩,斯仁,刘健. 小偏距S弯二元喷管的红外辐射特性数值分析[J]. 航空动力学报, 2015, 30(9): 2080-2087. DOI: 10.13224/j.cnki.jasp.2015.09.005 |
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| 作者姓名： | 于明飞 吉洪湖 李宁 王浩 斯仁 刘健 |
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| 作者单位： | 1. 南京航空航天大学 能源与动力学院, 南京 210016; |
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| 摘 要： | 为了降低飞行器的红外辐射,适应发动机排气系统与飞机后机身的匹配,设计了一种非常规的S弯二元喷管,喷管出口中心线与发动机轴线不共线,有一个小偏距.在商业软件中计算该S弯二元喷管的温度场、速度场、压力场和组分浓度的分布,采用自主开发的红外软件,用反向蒙特卡罗法计算该喷管的红外辐射特性,并与基准轴对称喷管的计算结果进行对比,计算结果表明:采用小偏距S弯二元喷管后,能够对排气系统内部高温部件有一定的遮挡,对红外辐射特征有一定的抑制作用,最大能够降低33%的红外辐射.
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| 关 键 词： | S弯二元喷管 小偏距 红外辐射 反向蒙特卡罗法 排气系统 |
| 收稿时间： | 2014-03-12 |
Numerical analysis on infrared radiation characteristics of two-dimensional S-nozzle with small offset |
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| YU Ming-fei,JI Hong-hu,LI Ning,WANG Hao,SI Ren and LIU Jian. Numerical analysis on infrared radiation characteristics of two-dimensional S-nozzle with small offset[J]. Journal of Aerospace Power, 2015, 30(9): 2080-2087. DOI: 10.13224/j.cnki.jasp.2015.09.005 |
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| Authors: | YU Ming-fei JI Hong-hu LI Ning WANG Hao SI Ren LIU Jian |
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| Affiliation: | 1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Guizhou Aero-engine Research Institute, Aviation Industry Corporation of China, Guiyang 550081, China |
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| Abstract: | In order to reduce the infrared radiation of aircraft, and make the exhaust system match the aircraft afterbody, a kind of unconventional two-dimensional(2-D)S-nozzle was designed to suppress the infrared radiation characteristics. There was a small offset given that the nozzle's center line and the engine's axis were not collinear. Based on the distribution of temperature, pressure and species mass fraction of the two-dimensional S-nozzle obtained from CFD results, the infrared radiation characteristics of two-dimensional S-nozzle was calculated with reverse Monte-Carlo method, then analyzed and compared with axisymmetric nozzle. The results show that, the two-dimensional S-nozzle is capable of shielding the high temperature elements inside the exhaust system effectively, and the infrared radiation characteristics of the exhaust system can be further suppressed by 33%. |
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| Keywords: | 2-D S-nozzle small offset infrared radiation reverse Monte-Carlo method exhaust system |
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