Numerical Analysis of Effects of Opening Position of Obstructions on P-Q Curves of Small Axial Cooling Fan

Abstract

This study describes P-Q curves of the 40mm scale small axial flow fan mounted in high-density packaging electronic equipment. An accurate prediction of supply flow rate by fans strongly affects the reliability of the cooling design. However, in high-density packaging electronic equipment, the fan performance is affected by the mounting components around the fans, and the accurate prediction of the supply flow rate becomes difficult. In this paper, by a CFD analysis, visualization around the fan was conducted while changing the opening position of the obstruction in front of the fan. Through the analysis, it was found that the different opening position causes different tendency of decrease in P-Q curves.