Convective Heat Transfer Investigation of a Confined Air Slot-Jet Impingement Cooling on Corrugated Surfaces with Different Wave Shapes

[+] Author and Article Information
Recep Ekiciler

Teaching Assistant, Gazi University, Mechanical Engineering Department, Ankara, Turkey

Muhammet Samet Ali Çetinkaya

Karabuk University, Mechanical Engineering Department, Karabuk, Turkey

Kamil Arslan

Associate Professor, Karabuk University, Mechanical Engineering Department, Karabuk, Turkey

1Corresponding author.

ASME doi:10.1115/1.4041954 History: Received June 14, 2018; Revised October 23, 2018


In this present study, air jet impingement cooling on flat, triangular-corrugated and sinusoidal-corrugated surfaces were conducted numerically. Constant surface temperature was subjected to the bottom surface Air, was the working fluid. The air was exited from a rectangular shape slot and impinged to the bottom surface. The Reynolds number was changed between 125 and 500. The governing equations were solved using the finite volume method (FVM). The effect of shape of bottom surface was investigated on heat and flow characteristics. Average and local Nusselt number were calculated for each case. It is obtained that Nusselt number increases by increasing Reynolds numbers. The optimum conditions were determined to get much more enhancement in terms of Nusselt number. It was revealed that the shape of the cooling surface (bottom wall) is substantially influence the heat transfer.

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