Numerical Simulation of Flow and Heat Transfer Characteristics in Rectangular Channel with Novel Longitudinal Vortex Generators

A novel combined longitudinal vortex generator, comprising a rectangular wing mounted with an accessory rectangular wing, was introduced and the turbulent flow and heat transfer characteristics of a rectangular channel with rectangular winglet pair and combined winglet pair were numerically analyzed. The effects of six parameters were examined. The results show that in the range of the present study, the increase of the six parameters can result in the increase of heat transfer and pressure drop. Specially, the pressure drop decrease at large value of the distance of accessory wing from the channel bottom. The effect of the main attack angle of the combined winglet pair is somewhat different to that of the rectangular winglet pair. The heating plate temperature of the channel with combined winglet pair is lower than that of the channel with rectangular winglet pair, and hence the heat transfer is enhanced.