Research on Radiation Spectroscopy Thermometry of Plume of Solid Rocket Motor
GUO Xiao-xu1, PAN Ke-wei2, HOU Long-feng1, YANG Bin1*, PING Li1, XU Qiu-li2, LIU Jin-liang1, WANG Ying1
1. School of Energy and Power Engineering; Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2. Shanghai Space Propulsion Technology Research Institute, Shanghai 201109, China
Abstract：The plume of solid rocket motor has the characteristics of high temperature, high speed and intense radiation. The temperature of the plume is an essential parameter of condition and performance.The accurate temperature measurement of the plume of a solid rocket motor is important to provide a valuable reference for understanding the internal combustion condition and the overall performance of the motor. With the development of laser and spectroscopy, the laser spectroscopy technology is gradually applied to the measurement of combustion of solid propellant and plume temperature. Radiation spectroscopy thermometry can realize the non-intrusive and on-line measurement of temperature by measuring the radiation spectrum of flame. It has the advantages of wide temperature measuring range, fast response and high reliability. It can be applied to measure the temperature of the plume of the solid rocket motor. In this paper, the thermometry based on radiation spectroscopy was proposed to measure the temperature of the plume of the solid rocket motor. The measurement system of the radiation spectrum of the plume of the solid rocket motor was built using a 350～1 000 nm fiber spectrometer. Moreover, the spectral response coefficient was calibrated with a standard radiation blackbody furnace. The curve of response coefficient with wavelength was obtained to revise the measured radiation spectrums of the plume. Then the measurement system was applied to ground tests of standard Φ118 solid rocket motors, the radiation spectrums of the plume of the solid rocket motor, which with a typical 12% aluminum mass content propellant, were measured. The characteristics of radiation spectrums at different working times were analyzed. Furthermore, the graybody assumption was discussed based on the two-color gray judgment principle. The radiation of plume in a 675～745 nm spectral range can be considered as graybody.The maximum relative deviation of emissivity with wavelength was 4.01%, and the corresponding mean-variance was 1.53%. Therefore, the parameters of temperature and emissivity at the different working times were obtained by spectral fitting based on Planck radiation law. The maximum deviation between the temperature measurement and the theoretical thermodynamic calculation is 5.40%. Besides,the relationship between the measurement results and conditions were discussed, the radiation spectrums of the plume of the solid rocket motors with 12%, 15%, and 19% aluminum mass content propellants were measured, and the characteristics of radiation spectrums with different aluminum mass content were discussed. In addition, the influences of aluminum mass content on radiation spectrums, temperature, and emissivity of the plume were analyzed with the measurement results. This research on radiation spectroscopy thermometry of the plume of the solid rocket motor can provide the tool for performance evaluation and formulation optimization of the solid rocket motor. The influences of aluminum mass content of propellant on radiation spectrums, temperature, and emissivity of the plume can provide the experimental data support for reducing the characteristic signal of the plume of the solid rocket motor.
基金资助: The National Key Research and Development Program of China (2017YFB0603204), the National Natural Science Foundation of China (51806144), the Natural Science Foundation of Shanghai (19ZR1454500), Shanghai Space Science and Technology Innovation Foundation (SAST2017-123)
通讯作者:
杨 斌
E-mail: yangbin@usst.edu.cn
作者简介: GUO Xiao-xu, (1996—)，master degree candidate, University of Shanghai for Science and Technology
e-mail:
1132232145@qq.com
引用本文:
郭校绪，潘科玮，侯龙锋，杨 斌，平 力，徐秋丽，刘津良，王 莹. 固体火箭发动机羽流辐射光谱测温方法研究[J]. 光谱学与光谱分析, 2021, 41(01): 305-311.
GUO Xiao-xu, PAN Ke-wei, HOU Long-feng, YANG Bin, PING Li, XU Qiu-li, LIU Jin-liang, WANG Ying. Research on Radiation Spectroscopy Thermometry of Plume of Solid Rocket Motor. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(01): 305-311.
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