Performance Enhancement of a Small Centrifugal Cooling Fan

Under the rapid enhancement of CPU performance, the thermal management on the CPU becomes a challenging task, especially for the industrial PC with a high system resistance. The traditional axial fan with heat sink assembly is not capable to solve this difficult thermal-dissipation problem. Thus, a combination of centrifugal fan and heat sink is utilized to solve this high system-resistance for a server. A centrifugal fan is utilized to offer extra static pressure for drawing the hot air inside this compact enclosure and discharging to the atmosphere. In this study, experimental measurement and numerical simulation are integrated to improve the aerodynamic performance of a blower (80x 80x15 mm3) by redesigning its housing and rotor. Also, fan performance and acoustic experiment are conducted in an AMCA 210-99 test chamber and a semi-anechoic chamber following CNS-8753 code for ensuring a reliable test platform. In conclusion, based on experimental and CFD outcomes, the maximum flow rate and the static pressure of the improved design alternative are successfully increased by 19.5% and 25.53%, respectively.