Fig. 1. Schematic view of the optical path calculation in the interested region.

Fig. 2. (a) Assumed two-dimensional temperature distribution; (b) the assumed two-dimensional concentration distribution.

Fig. 3. (a), (b), (c), (d), and (e) Effect of the relaxation parameter λ on the reconstruction errors, correlations, and iteration time for different iterative algorithms, and (f) the iteration number on the reconstruction errors.

Fig. 4. Phantoms for (a), (c), (e), and (g) temperature distribution; (d), (b), (f), and (h) concentration distribution reconstructed with the ART, SIRT, MART, and AART algorithms (0.3% noise levels in the projections).

Fig. 5. (a) Schematic diagram of the experimental arrangement. (b) Optical arrangement using 32 laser beams penetrating the flame region.

Fig. 6. (a) and (b) Reconstructed temperature and concentration distribution of the McKenna burner with 32 laser beams at the equivalence ratio of 1.0.

Fig. 7. Left: center line temperature profile from the reconstructed measurements and the thermocouple traverse from the McKenna burner at the equivalence ratio of 1.0; right: the figure of the McKenna burner at the equivalence ratio of 1.0.