IR radiation imaging test, process and evaluation of jet aeroengine

Chen Shiguo; Jiang Yong; Fang Haobai; Li Zu

The infrared(IR) signature is the important basis for IR stealth design and anti-stealth detection of jet aero-engine. There were three major contributions in this paper. Firstly, the jet aero-engine had a wide temperature span to be measured, which was far too large for an IR camera to cover in one snapshot. This was accomplished by using multi-integral time combined measure method, each integral time was optimized to a definite range of temperature and to make sure that the combination of all integral times seamlessly covered the entire temperature range of target. Secondly, the measured temperature range of each integral time was defined by multi-frame image time-averaging method, then a per-pixel radiance replacement and images synthesization method was proposed to form an integrated IR image. Compared with IR image of single integral time, the integrated image shows abundant target details and signature information. Finally, the distribution of IR radiant intensity was calculated, compared with IR spectroradiometer measurement at the same test-point, and error was less than 10%. The result shows that proposed methods based on IR camera are all reasonable and efficient.

1. Science and Technology Plasma Dynamics Laboratory,Air Force Engineering University,Xi'an 710038,China

Received Date: 2013-07-12

Rev Recd Date: 2013-08-16

Publish Date: 2014-03-25

Key words:

Abstract: The infrared(IR) signature is the important basis for IR stealth design and anti-stealth detection of jet aero-engine. There were three major contributions in this paper. Firstly, the jet aero-engine had a wide temperature span to be measured, which was far too large for an IR camera to cover in one snapshot. This was accomplished by using multi-integral time combined measure method, each integral time was optimized to a definite range of temperature and to make sure that the combination of all integral times seamlessly covered the entire temperature range of target. Secondly, the measured temperature range of each integral time was defined by multi-frame image time-averaging method, then a per-pixel radiance replacement and images synthesization method was proposed to form an integrated IR image. Compared with IR image of single integral time, the integrated image shows abundant target details and signature information. Finally, the distribution of IR radiant intensity was calculated, compared with IR spectroradiometer measurement at the same test-point, and error was less than 10%. The result shows that proposed methods based on IR camera are all reasonable and efficient.

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Reference (19)

[1]	Sang Jianhua, Zhang Zongbin. Development trends of infrared stealth technology [J]. Infrared and Laser Engineering, 2013, 42(1): 14-19. (in Chinese) 桑建华, 张宗斌. 红外隐身技术发展趋势[J]. 红外与激光工程, 2013, 42(1): 14-19.
[2]
[3]
[4]	Division P W A. Turbine engine infrared signature program[R]. AD-A028659, 1976.
[5]
[6]	George W, G Warren E, Donald S, et al. IR field measurements from the FISTA aircraft; calibration, data reduction, and development of IR signature models[R]. ADA394460, 1999.
[7]	Morris T A. Analysis of uncertainties in infrared camera measurements of a jet aero-engine in an altitude test cell[J]. Infrared Physics Technology, 2006, 48(2): 130-153.
[8]
[9]
[10]	Liu Youhong, Shao Wanren, Zhang Jinxiu, et al. Numerical simulation of flow field and infrared characteristics of an aero-engine exhaust system and its plume [J]. Journal of Aerospace Power, 2008, 23(3): 591-597. (in Chinese) 刘友宏, 卲万仁, 张锦绣, 等. 发动机排气系统及尾喷流的流场和红外特征数值模拟[J]. 航空动力学报, 2008, 23(3): 591-597.
[11]	Liu Juan, Gong Guanghong, Han Liang, et al. Modeling and simulation of airplane infrared characteristic[J]. Infrared and Laser Engineering, 2011, 40(7): 1209-1213. (in Chinese) 刘娟, 龚光红, 韩亮, 等. 飞机红外辐射特性建模与仿真[J]. 红外与激光工程, 2011, 40(7): 1209-1213.
[12]
[13]
[14]	Mei Fei, Jiang Yong, Chen Shiguo, et al. Infrared imaging prediction model for aero-engine exhaust plume[J]. Laser Infrared, 2012, 42(8): 909-913. (in Chinese) 梅飞, 江勇, 陈世国, 等. 一种航空发动机喷流红外成像仿真模型[J]. 激光与红外, 2012, 42(8): 909-913.
[15]
[16]	Shan Yong, Zhang Jingzhou, Shao Wanren, et al. Experiments on infrared radiation characteristics of exhaust system for a jet aero-engine [J]. Journal of Aerospace Power, 2009, 24(10): 2228-2234. (in Chinese) 单勇, 张靖周, 邵万仁, 等. 某型涡扇排气系统缩比模型红外辐射特征实验[J]. 航空动力学报, 2009, 24(10): 2228-2234.
[17]
[18]	Luo Mingdong, Ji Honghu, Huang Wei, et al. Experiment on spectral infrared radiation characteristics of exhaust jet from 2D nozzle of jet aero-engine [J]. Journal of Propulsion Technology, 2007, 28(2): 152-156. (in Chinese) 罗明东, 吉洪湖, 黄伟, 等. 二元喷管热喷流的红外光谱辐射特性实验[J]. 推进技术, 2007, 28(2): 152-156.
[19]	Fan Jinxiang, Yang Jianyu. Evelopment trends of infrared imaging detecting technology [J]. Infrared and Laser Engineering, 2012, 41(12): 3145-3153. (in Chinese) 范晋祥, 杨建宇. 红外成像探测技术发展趋势分析[J]. 红外与激光工程, 2012, 41(12): 3145-3153.

IR radiation imaging test, process and evaluation of jet aeroengine

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