Abstract
Four tomography algorithms, including the algebraic reconstruction
technique, simultaneous iterative reconstruction technique, the
multiplicative algebraic reconstruction technique, and the adaptive
algebraic reconstruction technique (AART), are compared with each other
based on the tunable diode laser absorption spectroscopy technique; the
determination of the relaxation parameter is discussed to improve
reconstruction quality and shorten computational time as much as possible.
The calculated results demonstrate that the AART algorithm can produce the
reconstruction results with better quality and less computational time. In
the experimental measurement, the AART algorithm with a two-line
thermometry scheme is adopted to measure the spatial distribution of
H2O temperature and concentration, two H2O
absorption lines near 1397.8 nm are selected, the temperature and
H2O concentration in the McKenna plat premixed flames are
experimentally reconstructed and analyzed, and the results of integrated
tomography reconstruction are consistent with the thermocouple traverse
measurement.
© 2016 Chinese Laser Press
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