Fan Noise Control and Heat Dissipation Optimization of Commercial Vehicle Cooling System

Abstract

Aiming at the problem of matching fan noise and heat dissipation in a commercial vehicle cooling system, it is proposed to reduce noise by changing the fan structure and to increase the windshield to block the hot air reflux. By changing the number of blades, wheel hub ratio, blade bending angle fan performance parameters, and the cooling fan mass flow rate and aerodynamic noise were simulated by CFD, the fan performance parameters were optimized. Then, the flow field and temperature field of engine cabin are analyzed. According to the analysis, the hot air reflux exists in the radiator, and the baffle is added to the upper part of the radiator and to the left and right sides of the radiator to block the reflux. The results show that the fan noise is reduced by 2.7 dB and the maximum temperature in the engine cabin is reduced from 417k to 392k.