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 cm1 and 7467.77 cm1) of combustion product H2O 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 CH4/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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