Abstract:

For a sunflower radiator with a length of 10 cm, a fin number of 18, a fin thickness of 0.7 mm, and a fin height of 14 mm, numerical simulation model was established. The simulation was verified by experiments and errors were within 3.5%, which proved that the simulation result was reliable. Based on this, numerical simulation was carried out to study the quantitative relationship between radiator length, fin number, fin height and fin thickness vs. fin temperature and heat transfer coefficient. The results show that under the same amount of heat dissipation, the fin temperature and heat transfer coefficient decrease with the increase of the radiator length, while the fin temperature decreases first and then increases with the increase of fin number. Therefore, there is an optimal number of fins to maximize heat dissipation. The fin temperature decreases with height, while the fin thickness has little effect on the fin temperature.

Key words: heat transfer coefficient, numerical simulation, sunflower radiator, thermal performance