Effect of Climate Wind Tunnel Blockage on Air-side Flowfield of Cooling Module

Abstract:

Based on numerical simulation, it created a 1:1 scaled model of the climate wind tunnel and the passenger car, to investigate the effect of climate wind tunnel blockage on the cooling system experiment, and analyze the air-side flowfield of cooling module and the frontal velocity profile. The results indicate that, along with the increase of blockage ratio, the velocity distribution on the windward surface of radiator will make a difference, but little change for the uniformity index of velocity distribution. As the blockage surpasses 0.486, the air mass flow through the radiator has an obvious decrease, even up to 5%. Due to the blockage effect, the frontal velocity profile exists an offset, which is inconsistent in different positions. Consequently, the climate wind tunnel needs to perform a blockage correction according to the different experimental targets.