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Optical Engineering

Reconstruction of combustion temperature and gas concentration distributions using line-of-sight tunable diode laser absorption spectroscopy
Author(s): Zhirong Zhang; Pengshuai Sun; Tao Pang; Hua Xia; Xiaojuan Cui; Zhe Li; Luo Han; Bian Wu; Yu Wang; Markus W. Sigrist; Fengzhong Dong
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Paper 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.

Paper Details

Date Published: 19 July 2016
PDF: 9 pages
Opt. Eng. 55(7) 076107 doi: 10.1117/1.OE.55.7.076107
Published in: Optical Engineering Volume 55, Issue 7
Show Author Affiliations
Zhirong Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Pengshuai Sun, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Tao Pang, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Hua Xia, Anhui Institute of Optics and Fine Mechanics (China)
Xiaojuan Cui, Anhui Institute of Optics and Fine Mechanics (China)
Zhe Li, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Luo Han, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Bian Wu, Anhui Institute of Optics and Fine Mechanics (China)
Yu Wang, Anhui Institute of Optics and Fine Mechanics (China)
Markus W. Sigrist, ETH Zürich (Switzerland)
Fengzhong Dong, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)


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