Numerically Simulation of Flowing and Heat Transfer with Airflow Over Holes Fins Tube

Abstract:

The performance of the flowing and heat transfer with airflow over the three symmetrical bigholes fins tube are studied by the numerical simulation in comparison with the plane fines.The distributions of the velocity,temperature and Nu(Nuselt number) on the surfaces of the plane fins and the three symmetrical bigholes fins at different Re numbers are obtained.The maximal error between the modeling result and experiment bats of the plane fins is less than 10%,which verifies the simulation method.The simulation results prove that when the air flow Re number changes from 1 610 to 6 440,the surface heat transfer of the three symmetrical bigholes fin is higher by over 25 percent in comparison with the plane fin.This kind of fin is applicable to the fintube cooling heat exchanger and the effect of heat transfer is perfect.