EFFECT OF PROTRUSIONS ARRANGEMENTS ON THE THERMAL PERFORMANCE OF JET IMPINGEMENT COOLING FOR A CURVED SURFACE

Abstract

A present investigation shared light on the applicability of different arrangements of multiple protrusions for improving the thermal performance of jet impingement. A two-dimensional simulation is performed to capture the local heat transfer attributes of jet impingement on a protruded surface with the help of commercially available CFD code FLUENT. Air is chosen as a working fluid due to its applicability in various cooling applications. The effect of flow conditions (Re = 5000-15000) is investigated for smooth and multi-protruded surfaces. The overall thermal performance of jet can improve or deteriorate based on the restriking of jet and the formation of a recirculation bubble on a surface. A recirculation bubble is more influenceable than the restriking of jet. A smaller protrusion angle and larger protrusion diameter positively impact the overall thermal performance of jet impingement. © 2023 by JSME.