Fig. 1. Schematic diagram of infrared observation of turbine guide vanes

Fig. 2. Demonstration of calculation of surface angular coefficients of microelements

Fig. 3. Closed system composed of n isothermal surfaces

Fig. 4. Radiation heat transfer model between concentric spheres

Fig. 5. Structural model of turbine guide vane

Fig. 6. Schematic diagram of blade section

Fig. 7. Blade grid division

Fig. 8. Temperature and error distribution of blade wall with different inlet Radiant intensity

Fig. 9. Distribution of blade wall error along blade height with different inlet radiant intensity

Fig. 10. Distribution of blade wall temperature and error at different outlet radiant intensity

Fig. 11. Distribution of blade error along blade height for different outlet radiant intensity

Fig. 12. Wall temperature and error distribution of blades with different surface Emissivity

Fig. 13. Error distribution of blades with different surface Emissivity along blade height