COOLING CHARACTERISTICS OF PARTIALLY HOLLOW FINNED PLATE EXPOSED TO JET IMPINGEMENT

El-sayed Gomaa, Mohamed; Galal Gomaa, Abd Alla; Ibrahim Eid, El-Desuki

doi:10.21608/jesaun.2008.117288

COOLING CHARACTERISTICS OF PARTIALLY HOLLOW FINNED PLATE EXPOSED TO JET IMPINGEMENT

Document Type : Research Paper

Authors

¹ Specialized Studies Academy, Workers University, Technology Dept., Ismailia, EGYPT.

² Refr. and A/C Dept., The Faculty of Industrial Education, Helwan University, Cairo, EGYPT

³ Mech. Dept., the Faculty of Industrial Education, Suez Canal University, Suez, EGYPT.

10.21608/jesaun.2008.117288

Abstract

In the present work, experimental and numerical investigations have been performed to determine the enhancement of cooling characteristics of partially hollow finned plate due to its exposure to a jet impingement. Six test specimens were designed and manufactured with a particular reference of the heat sink of a PC processor as a test specimen. The hollow shapes were cut in the central zone of the specimens by an adequate cut to form a cylindrical hole or frustum-conical holes of different vertex angles. The effects of Reynolds number, angle of attack and nozzle-to-surface distance on the enhancement of cooling characteristics have been highlighted. Empirical correlations for Nusselt number at the stagnation zone of each hollow shape were exhibited. A three-dimensional numerical simulation using the CFD FLUENT-6.2- code was applied to the case study. The validated CFD model highlights the flow characteristics through the specimens. The results show that the partially hollow finned plate has the potential to deliver a remarkably higher enhancement in the thermal performance if it is compared with those traditional ones.

Keywords