S054033 A Study of Relationship between Heat Transfer Enhancement and Strength of Vortex in Channel with Vortex Generator

In this paper, the numerical investigation is employed to compute the heat flu on the surface of the heat exchanger. The Prandtl number sets to be 0.71 and the Reynolds number based on the infl w velocity and height of VG is taken to 250. The effects of fl w and heat transfer by two types of VG (delta shape, rectangular shape) and install conditions of the rectangular shape fi is investigated by numerically. The vortex generator of rectangular shape fi is mounted on the bottom wall of the channel, their angles with respect to main fl w are taken to 30°, 45° and 60° and their punched out angles with respect to bottom wall are set to 45°, 60° and 90°. The effects in the wake of VG are examined in above condition and the Nusselt number, pressure drop, bulk temperature, velocity distribution and vortex strength are compared with the various VG conditions, we survey relationship between the vortex strength and heat transfer enhancement.