Simulation and Experimental Validation of High Velocity Gas Jet Impact Heat Transfer in Casting Die Cooling Channel

This study adopts computational fluid dynamics method to numerically simulate and experimentally investigate the transient heat transfer process of gas impingement jet in the cooling channel of aluminum alloy wheel hub casting die, and to obtain the rule of change of convective heat transfer coefficient in the cooling channel, and the wall temperature of the cooling channel. Compared with the experimental data, the results show that the mathematical model of the wall temperature prediction accuracy within ± 5%. It is found that the stationary point position has the highest heat transfer coefficient, while the side position of the cooling channel has a relatively low heat transfer coefficient. The heat transfer coefficient in the cooling channel increases gradually with the increase of gas inflow velocity. This study provides accurate boundary conditions for the simulation model of aluminum alloy wheel casting process.