Experimental investigation of infrared suppressing characteristics of rectangular nozzles with large aspect ratio

ZHANG Bo; JI Hong-hu; LUO Ming-dong; HUANG Wei; CAI Xu; GAO Chao

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Experimental investigation of infrared suppressing characteristics of rectangular nozzles with large aspect ratio

更新时间：2026-07-07

- Experimental investigation of infrared suppressing characteristics of rectangular nozzles with large aspect ratio
- Vol. 22, Issue 12, (2007)
- 作者机构：
  
  南京航空航天大学能源与动力学院,南京,210016
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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ZHANG Bo, JI Hong-hu, LUO Ming-dong, et al. Experimental investigation of infrared suppressing characteristics of rectangular nozzles with large aspect ratio[J]. 2007, 22(12).
DOI：

ZHANG Bo, JI Hong-hu, LUO Ming-dong, et al. Experimental investigation of infrared suppressing characteristics of rectangular nozzles with large aspect ratio[J]. 2007, 22(12). DOI：

摘要

对5组不同宽高比(W/H=1～1)的圆转矩形收敛喷管模型(AR1～AR1) 在尾向可见明火时的红外辐射特性进行了试验研究

并与等出口面积的轴对称喷管(AR0)进行了比较

喷管模型为某型实际喷管缩比4.3倍得到的.研究发现

与轴对称喷管相比

大宽高比矩形喷管减小了红外源的辐射特征

起到了明显的红外抑制作用.在0°～90°范围内

所研究的喷管在3～5 μm波段上的红外辐射信号呈现随探测角度增大逐渐减小的规律.

Abstract

The infrared suppressing characteristics of five rectangular convergent nozzles with different aspect ratios were investigated experimertey.The aspect ratio of the rectangular nozzles is 1

and 16

named AR1~AR16 respectively

while the axisymmetric nozzle is named AR0.The results indicate that infrared radiation from rectangular nozzle decreases with the increase of detection angle

and the magnitude of infrared radiation is smaller than axisymmetric one

and would accelerate with the rise of aspect ratio.

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Related Institution

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