Abstract
Heat transfer enhancing method is more and more needed to decrease heat exchanger size and power consumption. This study was carried out to develop a high performance vortex generator, and clarify the relationship between vortex structure and heat transfer. Arc wing pair was developed to increase lift-drag ratio. It was clarified that Arc wing pair had higher performance than Double delta wing pair by 5% at flow velocity of 1.0m/s (Re=1900) by measuring average heat transfer coefficient and pressure drop. It was found that arc wing pair had the position of vortex core at short distance from center of wing pair than that of double delta wing pair. Therefore, vortex intensity was more stronger by the interaction of the between vortices, so heat transfer performance was improved.
