EXPERIMENTAL INVESTIGATION OF MULTI-JET COOLING SYSTEM WITH OPTIMIZED HEAT SINK DESIGNS

Abstract

In this study, a multi-jet impingement cooling system consisting of five (5) different heat sink design – flat, cone, radial, cone with pins and square pins – has been undertaken. Multi-jet impingement has shown to provide high local heat transfer coefficients and uniform surface temperatures. The interaction effects between the numerous geometrical parameters involved in multi-jet array makes it challenging to find the most optimum configuration of the system. So, in the first part of this study, both gradient based and heuristic optimization techniques were implemented to determine the optimum geometry of the system.

Subsequently, a comprehensive experimental investigation was conducted for the multi-jet impingement cooling system and all the heat sink designs. The thermal performance and pumping power requirements were determined for all the heat sinks. A comparative analysis was performed between all the heat sinks to determine the optimum heat sink design. Of all the heat sink designs, the cone with pins heat sink showed the greatest heat transfer performance with a thermal resistance of 0.23 K/W. The experimental results reveal that along with heat transfer area, the heat sinks design and hydrodynamics of flow plays crucial role in thermal performance