Numerical study of a liquid cooling device based on dual synthetic jets actuator

Abstract

This study focuses on an efficient and innovative cooling technology to improve thermal performance of high heat flux electronics. This paper proposes a novel liquid cooling active heat dissipation device based on a dual synthetic jets actuator (DSJA). The heat transfer mechanism and flow mechanism of DSJA in the channel are studied through 3D CFD numerical simulation. Then the influence of inlet flow rate, jet orifice diameter, and diaphragm frequency on the cooling device are analyzed. Heat transfer and pressure drop are significantly influenced by the inlet flow rate when DSJA is off. DSJA has an excellent cooling capacity in the inlet flow range of 0.6–6 L/min after DSJ is on. The actuator with a water inlet turned on shows better heat transfer than the actuator without a water inlet. Increasing the diaphragm frequency from 15 Hz to 80 Hz enhances the heat transfer slightly and has little effect on pressure drop. The hydraulic thermal performance of DSJ before and after opening is 1.263, which verifies the high efficiency of DSJA for liquid cooling.