Air Jet Impingement Cooling of Electronic Devices Using Additively Manufactured Nozzles

This article reports the design, fabrication, and demonstration of additively manufactured air jet impingement coolers for the thermal management of high-power gallium nitride (GaN) transistors. The polymer jet coolers impinge high-speed airflow with a velocity of 42-195 m/s (Reynolds number between 1.87×104 and 8.77×104) onto working GaN devices mounted on a printed circuit board (PCB). The air j...