Fig. 1. Flame spectrum test platform

Fig. 2. CS2 flame spectrum after burning for 20 s

Fig. 3. Variation of CS₂ flame temperature at 5 cm scale

Fig. 4. The SO₂ molecular concentration at 5 cm scale

Fig. 5. The variation of SO₂ radiation intensity at 7.4 μm with burning time at 5 cm scale

Fig. 6. CS₂ flame spectrum at different scales

Fig. 7. Comparison of calculated values of the model with experimental measured value

Fig. 8. Comparison of SO₂ concentration inversion values and experimental values at 5 cm scale
(a): 20 s; (b): 40 s; (c): 60 s; (d): 80 s