Experiment of the thermo-radiation characteristic of infrared window of hypersonic vehicles

Wang Yahui; Wang Qiang; Zhang Bochuan; Zhou Bin; Xiao Liping; Xu Li

When hypersonic vehicles have flights in atmosphere, the temperature of the window of infrared (IR) detection systems rise rapidly, due to the aerodynamic heating by hypersonic airflow around. High-temperature IR windows dominate the aero-thermo-radiation effect, which reduce the performance of IR detection systems, including detection range, identification probability, tracking precision, and so on, or even make these systems fail. By simplifying radiation transfer model for IR windows, an experiment platform was designed to measure thermal-radiation characteristics of IR windows. On the platform, the experiment on thermal-radiation characteristics of a sapphire window were studied, in 3.7-4.8 m. The research result indicates that, in 100-350 ℃, the higher the temperature of the sapphire IR window is, the smaller the transmittance is, and the stronger the self-radiation is. Both the transmittance and the self-radiation are related to the third power of the window temperature. From 100 ℃ to 350 ℃, the transmittance of the window drops about 16%, otherwise the self-radiation enhances above 100 times, of which the influence on the MWIR detection system is bigger than that of transmittance.

1. School of Energy and Power Engineering,Beihang University,Beijing 100191,China;

2. National Key Laboratory of Science and Technology on Aerospace Intelligent Control,China Aerospace Science and Technology Corporatiom,Beijing 100854,China;

3. Beijing Aerospace Automatic Control Institute,Beijing 100854,China

Received Date: 2014-10-20

Rev Recd Date: 2014-11-07

Publish Date: 2015-06-25

Key words:

Abstract: When hypersonic vehicles have flights in atmosphere, the temperature of the window of infrared (IR) detection systems rise rapidly, due to the aerodynamic heating by hypersonic airflow around. High-temperature IR windows dominate the aero-thermo-radiation effect, which reduce the performance of IR detection systems, including detection range, identification probability, tracking precision, and so on, or even make these systems fail. By simplifying radiation transfer model for IR windows, an experiment platform was designed to measure thermal-radiation characteristics of IR windows. On the platform, the experiment on thermal-radiation characteristics of a sapphire window were studied, in 3.7-4.8 m. The research result indicates that, in 100-350 ℃, the higher the temperature of the sapphire IR window is, the smaller the transmittance is, and the stronger the self-radiation is. Both the transmittance and the self-radiation are related to the third power of the window temperature. From 100 ℃ to 350 ℃, the transmittance of the window drops about 16%, otherwise the self-radiation enhances above 100 times, of which the influence on the MWIR detection system is bigger than that of transmittance.

HTML

Reference (25)

[1]
[2]	Yin Xingliang. Principle of Aero-optics[M]. Beijing: China Aerospace Press, 2003. (in Chinese) 殷兴良. 气动光学原理[M]. 北京: 中国宇航出版社, 2003.
[3]	Peng Zhiyong, Wang Xiangjun, Lu Jin. Infrared target detection under hot dome infrared radiation based on visual saliency method[J]. Infrared and Laser Engineering, 2014, 43(6): 1772-1776. (in Chinese) 彭志勇, 王向军, 卢进. 窗口热辐射下基于视觉显著性的红外目标检测方法[J]. 红外与激光工程, 2014, 43(6): 1772-1776.
[4]
[5]
[6]	Tan Heping, Xia Xinlin, Liu Linhua. Numberical Calculation on Infrared Radiative Properties and Transfer Calculating Thermal Radiation[M]. Harbin: Harbin Institute of Technology Press, 2006. (in Chinese) 谈和平, 夏新林, 刘林华. 红外辐射特性与传输的数值计算-计算热辐射学[M]. 哈尔滨: 哈尔滨工业大学出版社, 2006.
[7]
[8]	Wang Yahui, Wang Qiang, Gao Lei, et al. Aero-thermo-radiation of a hypersonic vehicle[J]. Infrared and Laser Engineering, 2013, 42(6): 1399-1403. (in Chinese) 王亚辉, 王强, 高磊, 等. 高超声速飞行器气动热辐射特性[J]. 红外与激光工程, 2013, 42(6): 1399-1403.
[9]
[10]	Chen Lianzhong, Zhang Jiaxiang, Fei Jindong. Experiment research on the aerodynamic heating effect on the infrared imaging[J]. Laser Infrared, 2009, 39(1): 36-38. (in Chinese) 陈连忠, 张嘉祥, 费锦东. 气动加热对红外成像的影响试验研究[J]. 激光与红外, 2009, 39(1): 36-38.
[11]
[12]	Ma Yifei, Zhao Wenping. Effects of window radiation on infrared imaging detection [J]. Systems Engineering and Electronics, 2005, 27(32): 427-430. (in Chinese). 马毅飞, 赵文平. 窗口辐射对红外成像探测影响的研究[J]. 系统工程与电子技术, 2005, 27(32): 427-430.
[13]
[14]	Yu Huaizhi. Infrared Optical Material[M]. Beijing: National Defence Industry Press, 2007. (in Chinese) 余怀之. 红外光学材料[M]. 北京: 国防工业出版社, 2007.
[15]	Wei Chuncheng, Tian Guishan, Meng Fantao, et al. Influence of isostatic pressing on transparent of aluminum oxynitride ceramics[J]. Journal of Synthetic Crystals, 2008, 37(3): 694-698. (in Chinese) 魏春城, 田贵山, 孟凡涛, 等. 等静压成型对氮氧化铝陶瓷透明性的影响[J]. 人工晶体学报, 2008, 37(3): 694-698.
[16]
[17]
[18]	Xie Qiming, Li Yiwei, Pan Shunchen. The development and application of the materials for infrared windows and domes [J]. Infrared Technology, 2012, 34(10): 559-567. (in Chinese) 谢启明, 李奕威, 潘顺臣. 红外窗口和整流罩材料的发展和应用[J]. 红外技术, 2012, 34(10): 559-567.
[19]	Yu Qizheng. Principle of Radiation Heat Transfer [M]. Harbin: Harbin Institute of Technology Press, 1999. (in Chinese) 余其铮. 辐射换热[M]. 哈尔滨: 哈尔滨工业大学出版社, 1999.
[20]
[21]	Tao Wenquan. Numerical Heat Transfer[M]. 2nd Ed. Xi'an: Xi'an Jiaotong University Press, 2001. (in Chinese) 陶文铨. 数值传热学[M]. 第二版. 西安: 西安交通大学出版社, 2001.
[22]
[23]
[24]	Luo Maojie, Zhou Jinmei, Fu Jingneng, et al. Integration time as variable for radiometric calibration of infrared system[J]. Infrared and Laser Engineering, 2013, 41(2): 36-40. (in Chinese) 罗茂捷, 周金梅, 傅景能, 等. 考虑积分时间变量的红外系统辐射响应定标[J]. 红外与激光工程, 2013, 41(2): 36-40.
[25]	Gurevich E, Fein A. Maintaining uniformity of IR focal plane arrays by updating offset correction coefficients[C]//SPIE, 2003, 4820: 809-820.

Experiment of the thermo-radiation characteristic of infrared window of hypersonic vehicles

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views