Abstract:In order to study the fin structure on the overall performance of liquid cooling cooler for high power wind generator, CFD was used to build the mathematical model of fat fin, hole fin and boss fin. Under different Reynolds number Re, the influence of fin structure size on heat transfer coefficient h and pressure drop △P was analyzed, and the comprehensive performance evaluation factor h/△P1/3 is used to evaluate the cooler. The research showed that: with the increase of length to width ratio a/b, the h of hole fin, and the change of △P showed a gradual upward trend; but the h of boss fin decreased first and then raised, and the△P was similar to the hole fin. Also, through the comparison of h/△P1/3, it could be concluded that the overall improvement of hole fin is 12.7% compared with flat fins, and the reduction of boss fin is 50% compared with flat fins.