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. Double delta arc wing pair was developed to increase lift-drag ratio. It was clarified that double delta arc wing pair had higher performance than double delta wing pair by 5% at flow velocity of 1 .Om/s (Re=1900) by measuring average heat transfer coefficient and pressure drop. It was found that double delta arc wing pair had the effect of suppressing the flow separation from the wingtip. Therefore, double delta arc wing's pressure loss is reduced, so double delta arc wing showed a better performance.
