二元塞式喷管红外特征及壁面降温的红外抑制效果计算

陈俊; 吉洪湖

二元塞式喷管红外特征及壁面降温的红外抑制效果计算

陈俊^1,2,
吉洪湖¹

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中航商用飞机发动机有限责任公司, 上海 201109

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出版历程
- 收稿日期: 2011-07-14
- 刊出日期: 2012-11-28

Numerical simulation of the infrared radiation characteristics and infrared restraining effect of lower wall temperature for two-dimensional plug nozzle

CHEN Jun^1,2,
JI Hong-hu¹

1.
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
Aviation Industry Corporation of China Commercial Aircraft Engine Company Limited, Shanghai 201109, China

摘要

摘要: 用数值计算的方法研究了涡扇发动机二元塞式喷管在3~5μm波段的红外辐射特性,并与轴对称收扩喷管进行了对比.结果表明:无冷却措施时,相比于轴对称收扩喷管,二元塞式喷管在大部分探测角度上红外辐射增强,只在小部分的探测角度范围内具有红外抑制作用,在窄边探测面内探测角为90°方向上,其红外辐射强度降低了54%.若塞锥后部壁面温度降低300K,二元塞式喷管在大部分探测角度范围内的红外辐射强度明显低于轴对称喷管,在正尾向上的红外辐射强度降低了57%;与轴对称喷管中心锥表面降低相同温度相比,二元塞式喷管能取得更高的红外抑制效果,并且所付出的冷却代价较小.
- 轴对称收扩喷管 /
- 二元塞式喷管 /
- 红外辐射特征 /
- 中心锥降温 /
- 塞锥降温
Abstract: A numerical study was conducted on infrared radiation characteristics in the waveband of 3~5μm for two-dimensional plug nozzle of a turbofan engine,which was compared with an axisymmetric converge-diverge nozzle.The results reveal that:compared to axisymmetric converge-diverge nozzle,there is only a limited range of detecting angle,where the two-dimensional plug nozzle has infrared restraining effect.The infrared radiation of two-dimensional plug nozzle decreases 54% as the detecting angle equals to 90° on the narrow detecting side.On the condition that the back wall temperature of plug decreases 300K,the two-dimensional plug nozzle has visible infrared restraining effect on most detecting angle;moreover,its infrared radiation intensity decreases 57% towards the aft-nozzle.
- axisymmetric converge-diverge nozzle /
- two-dimensional plug nozzle /
- infrared radiation characteristic /
- lower cone temperature /
- lower plug temperature

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参考文献(15)

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