HITEMP derived spectral database for the prediction of jet engine exhaust infrared emission using a statistical band model

2012 ◽  
Vol 113 (12) ◽  
pp. 1575-1593 ◽  
Author(s):  
E. Lindermeir ◽  
K. Beier
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yue Zhou ◽  
Jie Wu ◽  
Liang Li ◽  
Qisheng Guo ◽  
Xijuan Zhu ◽  
...  

Abstract Numerical calculation of infrared emission from hot plume is of great significance for flight monitoring and detections. In this paper, the SNB (statistical narrow band) model established with parameters derived from the high-resolution spectral database HITEMP 2010 is used to perform the hot plume infrared signature simulations. Accuracy of the model is examined by the exact LBL (line by line) method, which proves the model’s reliability to predict radiative properties of combustion gases. In the application part, the SNB model is used to analyze infrared signatures of aircraft plumes cruising at different flight altitudes. The results show that cruising at a higher-altitude will obviously reduce the plume infrared emission. Besides, the plume infrared emissive energy mainly concentrates in a special wavenumber interval and can be strongly absorbed by atmosphere.


1998 ◽  
Vol 28 (1) ◽  
pp. 62-76 ◽  
Author(s):  
A. Petzold ◽  
F. P. Schröder

2015 ◽  
Vol 27 (2) ◽  
pp. 181-190 ◽  
Author(s):  
Haifu Wang ◽  
Liangcai Cai ◽  
Xiaolei Chong ◽  
Hao Geng

A combined blast fence is introduced in this paper to improve the solid blast fences and louvered ones. Experiments of the jet engine exhaust flow (hereinafter jet flow for short) field and tests of three kinds of blast fences in two positions were carried out. The results show that the pressure and temperature at the centre of the jet flow decrease gradually as the flow moves farther away from the nozzle. The pressure falls fast with the maximum rate of 41.7%. The dynamic pressure 150 m away from the nozzle could reach 58.8 Pa, with a corresponding wind velocity of 10 m/s. The temperature affected range of 40°C is 113.5×20 m. The combined blast fence not only reduces the pressure of the flow in front of it but also solves the problems that the turbulence is too strong behind the solid blast fences and the pressure is too high behind the louvered blast fences. And the pressure behind combined blast fence is less than 10 Pa. The height of the fence is related to the distance from the jet nozzle. The nearer the fence is to the nozzle, the higher it is. When it is farther from the nozzle, its height can be lowered.


1992 ◽  
Vol 38 (3) ◽  
pp. 119
Author(s):  
Timothy W. Lancey ◽  
Eugene E. Cooper
Keyword(s):  

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