Optimization of duct structure and analysis of its impact on temperature inside the shelter

Abstract

Abstract The flow field of the air duct in a shelter was studied using the computational fluid dynamics (CFD) and experiment methods. The improvement methods of vortexes at the bends were analysed. It was found that the corner chamfer and the installation of guide plates have significant effect on improving the vortex. The optimized scheme expanded the inlet and outlet area of the air duct and chamfered the inner bends, then the uniformity of velocity at outlets on both sides of the straight duct was increased by 47% and 42% respectively. The duct was placed in the shelter for simulation. The results showed that the total air volume of the air duct has increased, so the cooling effect is better. The temperature distribution in the shelter is more uniform after optimization, especially in the front part due to the improvement of vortexes.