Journal of Atmospheric and Environmental Optics

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Temperature Measurement of CH4/Air Premixed Flat Flame Burner Based on Tunable Diode Laser Absorption Spectroscopy

PENG Yuquan1,2, KAN Ruifeng1, XU Zhenyu1, XIA Huihui1, NIE Wei1,2, ZHANG Buqiang1,2, PEI Xiaofan1   

  1. 1~Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2~University of Science and Technology of China, Hefei 230026, China
  • Published:2019-05-17

Abstract: Temperature measurement is significant for combustion diagnosis. An on-line temperature measurement method based on tunable diode laser absorption spectroscopy(TDLAS) has been developed, which achieves dual laser cooperative work and simultaneous measurement of two absorption lines (7154.35 cm$^{-1}$ and 7467.77 cm$^{-1}$) of combustion product H$_2$O by dual beam time dividing scanning strategy. The accurate inversion of the temperature is realized by two-line integral absorbance ratio, which meets the application needs of on-line temperature detection of the combustion field. The experimental research on real-time detection of flame temperature in CH$_4$/air premixed flame furnace was carried out, and the results were compared with the thermocouple measurement, which shows TDLAS and thermocouples have good consistency with relative error less than 3.8\%. The feasibility and reliability of non-intrusive and rapid temperature measurement of the combustion field based TDLAS technology have been verified.

Key words: tunable diode laser absorption spectroscopy, water vapor, temperature, flat flame furnace, absorbance

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