Fig. 1. Structural diagram of the burner

Fig. 2. Experimental measurement system

Fig. 3. Swirling flame

Fig. 4. Moiré fringe images and tracer particle images. (a) Moiré fringes; (b) tracer particles

Fig. 5. Light deflection angle

Fig. 6. CT reconstruction results. (a) Temperature distributions in different cross-sections; (b) temperature distributions in different longitudinal-sections

Fig. 7. PIV reconstruction results. (a) Velocity nephogram on different sections and isovelocity surface; (b) streamline diagram

Fig. 8. Reconstructed velocity distributions. (a) Velocity distributions in different cross-sections; (b) velocity distributions in different longitudinal-sections