Two-step tomographic reconstructions of temperature and species concentration in a flame based on laser absorption measurements with a rotation platform

Huihui Xia, Ruifeng Kan*, Zhenyu Xu, Yabai He, Jianguo Liu, Bing Chen, Chenguang Yang, Lu Yao, Min Wei, Guangle Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We present a system for accurate tomographic reconstruction of the combustion temperature and H2O vapor concentration of a flame based on laser absorption measurements, in combination with an innovative two-step algebraic reconstruction technique. A total of 11 collimated laser beams generated from outputs of fiber-coupled diode lasers formed a two-dimensional 5×6 orthogonal beam grids and measured at two H2O absorption transitions (7154.354/7154.353 cm−1 and 7467.769 cm−1). The measurement system was designed on a rotation platform to achieve a two-folder improvement in spatial resolution. Numerical simulation showed that the proposed two-step algebraic reconstruction technique for temperature and concentration, respectively, greatly improved the reconstruction accuracy of species concentration when compared with a traditional calculation. Experimental results demonstrated the good performances of the measurement system and the two-step reconstruction technique for applications such as flame monitoring and combustion diagnosis.

Original languageEnglish
Pages (from-to)10-18
Number of pages9
JournalOptics and Lasers in Engineering
Volume90
DOIs
Publication statusPublished - Mar 2017
Externally publishedYes

Keywords

  • Tunable diode laser absorption spectroscopy
  • Combustion diagnostics
  • Algebraic reconstruction technique
  • Tomographic reconstruction in two steps

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