Fig. 1. LED air cooling system

Fig. 2. Schematic of design parameters

Fig. 3. Effect of radial distance A on temperature

Fig. 4. Velocity vector cloud images with different radial distances

Fig. 5. Effect of inlet distance B on temperature

Fig. 6. Velocity vector cloud images with different inlet distances

Fig. 7. Effect of outlet distance C on temperature

Fig. 8. Velocity vector cloud images with different air outlet distances

Fig. 9. Model residual plot of response surface

Fig. 10. Pareto diagram of influencing factors

Fig. 11. Response optimizer prediction

Fig. 12. Simulation of temperature cloud map

Fig. 13. Arrangement of LED temperature measurement points