TY - JOUR
T1 - Two-step tomographic reconstructions of temperature and species concentration in a flame based on laser absorption measurements with a rotation platform
AU - Xia, Huihui
AU - Kan, Ruifeng
AU - Xu, Zhenyu
AU - He, Yabai
AU - Liu, Jianguo
AU - Chen, Bing
AU - Yang, Chenguang
AU - Yao, Lu
AU - Wei, Min
AU - Zhang, Guangle
PY - 2017/3
Y1 - 2017/3
N2 - 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.
AB - 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.
KW - Tunable diode laser absorption spectroscopy
KW - Combustion diagnostics
KW - Algebraic reconstruction technique
KW - Tomographic reconstruction in two steps
UR - http://www.scopus.com/inward/record.url?scp=84989165838&partnerID=8YFLogxK
U2 - 10.1016/j.optlaseng.2016.09.005
DO - 10.1016/j.optlaseng.2016.09.005
M3 - Article
AN - SCOPUS:84989165838
SN - 0143-8166
VL - 90
SP - 10
EP - 18
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
ER -