1. School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China
2. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
3. Guangxi Colleges and Universities Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology, Guilin 541004, China
Abstract：Firstly, the source of potassium atoms in solid rocket engine exhaust plume and its radiation mechanism were introduced, and the spectrum of the potassium resonance doublet shape was analyzed based on the theory of atomic spectra. Secondly, the numerical simulation of the plume flow field distribution was carried out with the ideal jet model and the semi-empirical formula. The radiation spectral characteristics of potassium resonance doublet shape from rocket plume were calculated by using the C-G approximation method. Finally, the spectral characteristics of potassium resonance doublet shape signal in the wake of the plume were calculated by using the atmospheric radiative transfer model. The results demonstrate that this method can effectively simulate the fine structure of the NIR spectrum of exhaust plume. The simulation results also show that the signal energy of potassium resonance doublet spectrum can be effectively transmitted through atmosphere, which can be used as the basis for the detection and identification of exhaust plume.
[1] Montgomery J B, Sanderson R B, McCalmont J F, et al. Proc. SPIE, Signal and Data Processing of Small Targets, 2008, 6969: 696902(dio: 10.1117/12.778662).
[2] McDermott D J, Johnson R S, Montgomery J B, et al. Proc. SPIE, Airborne Intelligence, Surveillance, Reconnaissance (ISR) Systems and Applications V, 2008, 6946: 696902(dio: 10.1117/12.778658).
[3] Montgomery J B, Montgomery C T, Sanderson R B, et al. Proc. SPIE, Infrared Technology and Applications XXXV, 2009, 7298: 7298IN(doi: 10.1117/12.819935).
[4] ZHANG Shu-kun, CAI Jing(张术坤, 蔡 静). Laser & Infrared(激光与红外)，2010，(12): 1277.
[5] Lyons R B, Wormhoudt J, Kolb C E. in Spacecraft Radiative Transfer and Temperature Control, Horton T E ed. Prog. In Astro. and Aero, 1982, 83: 128.
[6] QI Xiao-fei, LI Jun-qiang, ZHANG Xiao-hong, et al(齐晓飞, 李军强, 张晓宏，等). Chinese Journal of Energetic Materials(含能材料), 2013, 21(3): 334.
[7] Vitkin E I, Karelin V G, Kirillow A A, et al. Int. J. Heat. Mass. Tran., 1997, 40(5): 1227.
[8] Jensen D E, Spalding D B, Tatchell D G, et al. Vanka S V P P. Numerical Prediction of Flow, Heat Transfer, Turbulence and Combustion. Pergamon, 1983. 368.
[9] Ye Qing, Sun Xiaoquan, Zhang Yunjun, et al. International Symposium on Photoelectronic Detection and Imaging. Advances in Infrared Imaging and Applications, 2009, 7383(18): 1.
[10] WU Long-bao, XIE Xiao-fang, WANG Cheng-long, et al(吴龙宝, 谢晓方, 王诚龙，等). Infrared and Laser Engineering(红外与激光工程), 2013, 42(1): 1.
[11] GAO Si-li, TANG Xin-yi(高思莉, 汤心溢). Opto-Electronic Engineering(光电工程), 2007, 34(8): 25.
[12] ZONG Peng-fei, ZHANG Ji-long, WANG Zhi-bin, et al(宗鹏飞, 张记龙, 王志斌，等). Laser & Infrared(激光与红外)，2013，(2): 171.
[13] YANG Bing-wei(杨炳尉). Journal of Astronautics(宇航学报)，1983，4(1)： 83.
[14] ZHOU Guo-hui, LIU Xiang-wei, XU Ji-wei(周国辉, 刘湘伟, 徐记伟). Infrared Technology(红外技术), 2008, 30(6): 331.
