宽高比对尾向可见明火矩形喷管红外抑制特性影响研究

张勃; 吉洪湖; 罗明东; 黄伟; 蔡旭

宽高比对尾向可见明火矩形喷管红外抑制特性影响研究

南京航空航天大学能源与动力学院, 南京 210016

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出版历程
- 收稿日期: 2006-11-14
- 修回日期: 2007-02-06
- 刊出日期: 2007-11-28

Research of the influence of aspect ratio on infrared suppressing characteristics of rectangular nozzles

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 以国外某型先进无人机上使用的涡扇发动机为基础,缩比4.3倍得到轴对称收敛喷管AR0,并在出口面积相同的条件下改变喷口形状得到5组不同宽高比(W/H=1～1)的矩形喷管模型(AR1～AR1).用傅立叶红外光谱仪对喷管与热喷流在3～5 μm波段上的红外辐射进行了测试.研究发现,与轴对称喷管相比,矩形喷管减小了红外源的辐射,起到了明显的红外抑制作用,并且其红外抑制特性随着宽高比的增大是逐渐增强的.
- 航空、航天推进系统 /
- 红外抑制 /
- 矩形喷管 /
- 大宽高比 /
- 双涵道
Abstract: Based on a fanjet currently used in an advanced unmanned vehicle,an axisymmetric nozzle AR0 of 4.3 expansion ratio was obtained.Under the same exit area,five rectangular convergent nozzle models(AR1^AR16)of different W/H(W/H=1¹6) were experimentally investigated.The infrared radiation of nozzles and hot jet streams at 3⁵ μm were tested using Fourier Infrared Spectroscope.The results indicate that the magnitude of infrared radiation from rectangular nozzle is smaller than axisymmetric one,and the infrared suppressing effect of rectangular nozzles improves with the increase of aspect ratio.
- aerospace propulsion system /
- infrared suppressing /
- rectangular nozzle /
- aspect ratio /
- double channels

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参考文献(9)

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