Abstract
The flow and heat transfer characteristics of rectan- gle channel with inclined-cut ellipsoidal vortex generator are obtained with large eddy simulation.The instantaneous proper- ties of velocity,temperature and pressure in channel are gained. The variety process of temperature,pressure and inducted vor- tex are revealed.Meantime,the heat transfer enhancement mechanism of vortex generator and flow structure are discussed. The turbulent model is used for verifying correctness of large eddy simulation in calculation of rectangle channel without vortex generator in the same calculation condition.The calcula- tion result with two methods is consistent.The result of simula- tion indicates that the vortex can be induced by vortex genera- tor.Furthermore,the stream-wise vortex induced by vortex generator pays more important role in heat transfer enhance- ment.Compared with the channel without inclined-cut ellip- soidal vortex generator in the same condition,the local heat transfer coefficient is enhanced from 64%～105%,and the av- erage heat transfer coefficient is enhanced from 17%～36%.The enhancement of local heat transfer coefficient is occurred nearby the vortex generator.There is a consanguineous rela- tionship between the fluid flow structure and status in near wall region with the local heat transfer.
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