加遮挡罩二元喷管红外辐射特性数值研究

吴博; 张靖周; 单勇; 邵万仁

加遮挡罩二元喷管红外辐射特性数值研究

1.
南京航空航天大学能源与动力学院,南京 210016
2.
中国航空工业集团公司沈阳发动机设计研究所,沈阳 110015

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出版历程
- 收稿日期: 2010-11-15
- 修回日期: 2011-04-16
- 刊出日期: 2011-10-28

Numerical research on infrared radiation characteristics of two-dimension nozzle with shelter covering

1.
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
Shenyang Aeroengine Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China

摘要

摘要: 采用计算流体动力学/红外辐射数值计算方法,针对涡扇发动机排气系统,研究了宽高比为3.33的圆转矩形二元喷管尾缘加装遮挡罩以及遮挡罩夹层通道注入冷却气流对红外辐射特性的影响.研究参数范围内的结果表明:遮挡罩内引射或强迫注气的冷却气流对喷流有进一步混合的作用,加装遮挡罩后喷流的红外辐射强度相对于单纯的二元喷管有一定幅度的降低;随着冷却气流流量的增大,二元喷管尾缘内壁面的温度降低效果越显著,有效地利用喷管的引射作用,可以取得良好的红外抑制效果;只有在喷管内壁面红外辐射占主导的探测范围内,加装遮挡罩抑制二元喷管红外辐射的作用才能得到体现.
- 排气系统 /
- 红外辐射 /
- 二元喷管 /
- 遮挡罩 /
- 计算流体动力学/红外辐射数值计算
Abstract: Based on CFD/IR(computational fluid dynamics/infrared radiation) numerical calculations,the effects of shelter covering fixed at nozzle trailing edge and cooling air injected inside the shelter covering passage on infrared radiation characteristics of turbofan engine two-dimensional nozzle with aspect ratio 3.33 were investigated.The results based on the present parameters show that,ejected or forced cooling air flow through shelter covering passage enhances further mixing with plume,and suppresses plume infrared radiation in comparison with pure two-dimensional nozzle.As the cooling air massflow increases,the cooling action on nozzle trailing edge is more obvious.Utilizing nozzle ejection effectively could achieve satisfactory infrared radiation suppression.The suppression action on nozzle total infrared radiation with shelter covering is only realized in the detecting azimuth where the infrared radiation from nozzle inner walls is predominant.
- exhaust system /
- infrared radiation /
- two-dimensional nozzle /
- shelter covering /
- CFD/IR(computational fluid dynamics/infrared radiation)numerical calculation

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参考文献(12)

[1]	Chu C W,Wun W A.Simple 2D nozzle plume for IR analysis .AIAA Paper 80-1808,1980.
[2]	Dechor R.Infrared emission from turbofans with high aspect ratio nozzles .AIAA Paper 81-4319,1981.
[3]	Weber Y S,Bowers D L.Advancements in exhaust system technology for the 21st century .AIAA Paper 89-2816,1989.
[4]	Hawkes T M.IHPTET exhaust nozzle technology demonstrator .AIAA Paper 93-2569,1993.
[5]	郑礼宝,张靖周.矢量二元收扩喷管热射流复杂流场特征研究[J].流体力学实验与测量,2000,14(2):26-30,48. ZHENG Libao,ZHANG Jingzhou.Investigation of hot-jet characteristics of 2D C-D vectoring nozzles [J].Experiments and Measurements in Fluid Mechanics,2000,14(2): 26-30,48.(in Chinese)
[6]	罗明东,吉洪湖,黄伟,等.二元喷管热喷流的红外光谱辐射特性实验[J].推进技术,2007,28(2):152-156. LUO Mingdong,JI Honghu,HUANG Wei,et al.Experiment on spectral infrared radiation characteristics of exhaust jet from 2D nozzle of turbofan engine[J].Journal of Propulsion Technology,2007,28(2):152-156.(in Chinese)
[7]	Reeder M F,Zaman K B.Impact of tab location relative to the nozzle exit on jet distortion[J].AIAA Journal,1996,34(1):197-199.
[8]	潘丞雄,张靖周,邵万仁,等.齿冠状收敛喷管模型气动和红外辐射特性数值研究[J].航空动力学报,2010,25(7):1518-1523. PAN Chengxiong,ZHANG Jingzhou,SHAO Wanren,et al.Numerical research on flow dynamics and infrared radiation characteristics for scaled chevron convergent nozzle[J].Journal of Aerospace Power,2010,25(7):1518-1523.(in Chinese)
[9]	罗昕,张靖周,单勇.加遮挡板后二元喷管的红外辐射特性数值模拟[J].推进技术,2008,29(6):696-700,732. LUO Xin,ZHANG Jingzhou,SHAN Yong.Numerical simulation on the infrared radiation characteristics of two-dimensional nozzles with sheltering baffles[J].Journal of Propulsion and Power,2008,29(6):696-700,732.(in Chinese)
[10]	Pao S P,Carlson J R.Computational investigation of circular-to-rectangular transition ducts[J].Journal of Propulsion and Power,1994,10(1):95-100.
[11]	SHAN Yong,ZHANG Jingzhou.Numerical investigation of flow mixture enhancement and infrared radiation shield by lobed forced mixer[J].Applied Thermal Engineering,2009,29(18):3687-3695.
[12]	董士奎,余其铮,谈和平,等.燃烧产物二氧化碳高温辐射的窄谱带模型参数[J].航空动力学报,2001,16(4):355-359. DONG Shikui,YU Qizheng,TAN Heping,et al.Narrow band model parameters of high temperature radiation for carbon dioxide of combustion products[J].Journal of Aerospace Power,2001,16(4):355-359.(in Chinese)