| 加遮挡罩二元喷管红外辐射特性数值研究 |
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| 引用本文： | 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[J].航空动力学报,2011,26(10):2287-2292. |
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| 作者姓名： | 吴博 张靖周 单勇 邵万仁 |
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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
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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| 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...
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| 关 键 词： | 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 |
| 收稿时间： | 2010/11/15 0:00:00 |
| 修稿时间： | 2011/4/16 0:00:00 |
Numerical research on infrared radiation characteristics of two-dimension nozzle with shelter covering |
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| WU Bo,ZHANG Jing-zhou,SHAN Yong and SHAO Wan-ren.Numerical research on infrared radiation characteristics of two-dimension nozzle with shelter covering[J].Journal of Aerospace Power,2011,26(10):2287-2292. |
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| Authors: | WU Bo ZHANG Jing-zhou SHAN Yong and SHAO Wan-ren |
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| Institution: | College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Shenyang Aeroengine Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China |
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| 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. |
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| Keywords: | exhaust system infrared radiation two-dimensional nozzle shelter covering CFD/IR(computational fluid dynamics/infrared radiation)numerical calculation |
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