抄録
The flow and heat transfer control to improve the performance of fin-tube type heat exchanger under large Reynolds numbers is shown. A louver type vortex generator was used because of it's high heat transfer characteristics, and the effect of louver angle, attack angle or raising angle, was examined mainly. The effects of the flow and heat transfer characteristics around and on the tube and fin plate were made clear by flow visualization, Particle Image Velocimetry (PIV) measurement, and temperature distribution measurement by thermo-graph. As a result, the maximum improvement rate of heat transfer is about 86% of the flat plate, plane fin.
