Reconstruction of combustion temperature and gas concentration distributions using line-of-sight tunable diode laser absorption spectroscopy

Zhirong Zhang; Pengshuai Sun; Tao Pang; Hua Xia; Xiaojuan Cui; Zhe Li; Luo Han; Bian Wu; Yu Wang; Markus  W. Sigrist; Fengzhong Dong

doi:10.1117/1.OE.55.7.076107

19 July 2016 Reconstruction of combustion temperature and gas concentration distributions using line-of-sight tunable diode laser absorption spectroscopy

Zhirong Zhang, Pengshuai Sun, Tao Pang, Hua Xia, Xiaojuan Cui, Zhe Li, Luo Han, Bian Wu, Yu Wang, Markus W. Sigrist, Fengzhong Dong

Author Affiliations +

Funded by: Natural Science Foundation of China, National Key Technology Research Development Program of the Ministry of Science and Technology of China, Special Fund for Basic Research on Scientific Instruments of the Chinese Academy of Science, CAS President’s International Fellowship Initiative

Optical Engineering, Vol. 55, Issue 7, 076107 (July 2016). https://doi.org/10.1117/1.OE.55.7.076107

Abstract

Spatial temperature and gas concentration distributions are crucial for combustion studies to characterize the combustion position and to evaluate the combustion regime and the released heat quantity. Optical computer tomography (CT) enables the reconstruction of temperature and gas concentration fields in a flame on the basis of line-of-sight tunable diode laser absorption spectroscopy (LOS-TDLAS). A pair of H₂O absorption lines at wavelengths 1395.51 and 1395.69 nm is selected. Temperature and H₂O concentration distributions for a flat flame furnace are calculated by superimposing two absorption peaks with a discrete algebraic iterative algorithm and a mathematical fitting algorithm. By comparison, direct absorption spectroscopy measurements agree well with the thermocouple measurements and yield a good correlation. The CT reconstruction data of different air-to-fuel ratio combustion conditions (incomplete combustion and full combustion) and three different types of burners (one, two, and three flat flame furnaces) demonstrate that TDLAS has the potential of short response time and enables real-time temperature and gas concentration distribution measurements for combustion diagnosis.

Citation Download Citation

Zhirong Zhang, Pengshuai Sun, Tao Pang, Hua Xia, Xiaojuan Cui, Zhe Li, Luo Han, Bian Wu, Yu Wang, Markus W. Sigrist, and Fengzhong Dong "Reconstruction of combustion temperature and gas concentration distributions using line-of-sight tunable diode laser absorption spectroscopy," Optical Engineering 55(7), 076107 (19 July 2016). https://doi.org/10.1117/1.OE.55.7.076107

Published: 19 July 2016

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