الفهرس 
Introduction and Literature reviewOnly 14 pages are availabe for public view
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Abstract
In convection heat transfer, the thermal resistance of the boundary layer is a challenging problem. One of the promising solutions is to suppress the boundary layer with the perturbation of a normal jet. To study the feasibility of this solution, a three-dimensional numerical model was created to study the transport phenomena in cooling a hot flat plate using an annular air jet perpendicular to a crossflow of air passing over a flat plate. The benchmark case is the cooling of the flat plate with crossflow only, with the total mass flow rate of both streams. The novelty of the present study is to combine the annular air jet and crossflow of air to enhance the cooling of a hot flat plate thus obtaining the optimal performance. A parametric study was performed by varying Reynolds number of the jet Rej, with different jet-to-plate spacings Z/D, and different blockage ratios BR. The performance evaluation coefficient, PEC, was set to identify the optimal performance of both thermal and hydraulic characteristics. Results show an enhancement of the heat transfer coefficient for all the cases under study. The average heat transfer coefficient was improved by up to 3.9 times the case without a jet