25 空調機用高性能ルーバフィン間の空気流れ

Abstract

It is necessary to know the air-flow pattern through fins, in order to improve the performance of heat exchangers for air-conditioners. This report presents some visualized examples of high performance fins, that is, convex louvered fin and inclined louvered fin. Aluminum powder method and dye injection method are used where air is replaced with water. In that case Reynolas number for visualized models is adjusted so as to agree with that for real heat exchangers. The visualized results of air flow utilized for deciding the louver arrangement of high performance louvered fins.