A comparison of air flow and shielding effectiveness of perforated enclosure panels

The goals of the thermal engineer and EMC engineer often lead to contradictory design requirements. The EMC engineer wants smaller cooling openings to provide more attenuation of electromagnetic leakage through an enclosure, while the thermal engineer wants larger openings to minimize the restriction of air flow. Previous research on perforated enclosure panels has focused mainly on their EMC performance with little thought given to how they impact the flow of cooling air. This paper addresses this deficiency by examining how the shapes and locations of the perforations also impact these two critical areas.

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