Experimental Investigation of Elliptical Air-Jet Impingement on Metal-Foamed Surface

Impinging air-jet cooling using open-cell metal foam is found to be a viable option for the removal of concentrated heat loads. An experimental study has been conducted for the air-jet cooling of the copper metal foamed flat plate using an elliptical nozzle of aspect ratios 1 and 4, respectively. The operational parameters include Reynolds number 40000 and 50,000, respectively, and the impinging distance is varied from 3 to 7. The nozzle's average and local thermal performance with a higher aspect ratio are found to be better. The enhancement in the peak value of the Nusselt number is found to be 35% for the Reynolds number 50000 by increasing the aspect ratio from 1 to 4.