Heat transfer enhancement of a turbulent duct flow by means of vortex generators attached to a large eddy break-up manipulator

摘要

An experimental study was conducted to investigate the characteristics of wall heat transfer and momentum loss for a turbulent duct flow disturbed by insertion of a complicated body composed of a LEBU (Large Eddy Break-Up) plate and winglet-type vortex generators. It was found that the LEBU plate reduces the wall heat transfer in the region downstream of the insertion position and that this suppression of heat transfer could be recovered by attaching vortex generators to the LEBU plate, i.e., conspicuous heat transfer enhancement was achieved over a large streamwise distance.