Experimental investigation of mixed convection on an oscillating vertical flat plate

摘要

This study experimentally investigates the mixed-convection heat transfer on a moving vertical flat plate. The setup comprises a hanger-pulley system above a transparent volume in which the experimental model moves; a flywheel-motor assembly, which generates the oscillation movement; a power supply; and a datalogger. The experimental model comprises two copper plates on which the thermocouples are placed and Kapton heaters between the plates. For the study, heat flux was applied to the plate surface (q") and the Womersley number (Wo) and dimensionless oscillation amplitude (Ao) were varied; the effects of these parameters on mixed-convection heat transfer were analyzed. The experiments were performed for four different values of Ao and five different oscillation frequencies with three different heat fluxes. The results show that heat-transfer performance is significantly affected by Ao, Wo, and heat flux applied to the plate surface. We observed that heat-transfer performance increases with the increase of both the Wo number and the dimensionless oscillation amplitude for all heat fluxes tested. The obtained results are presented as a function of dimensionless numbers. We also compare experimental results with other researchers' prior-published studies.