阵列微喷射流冷板传热及压降特性实验研究

Experimental Investigation on Heat Transfer and Pressure Drop Characteristics of Liquid Cooling Plate with Array of Micro Jets

本文针对一款具有阵列微喷射孔的液冷冷板搭建了液冷实验系统。液冷冷板结构为13×15的圆孔阵列,单个喷射孔孔径为0.5 mm。实验系统由水循环系统、加热源系统和信号数据采集系统组成。实验完成了从200 W至550 W间共8级的加热功率变化。随着喷射速率从0.22 m/s增加至0.58 m/s,压降从59.22 kPa升至288.38 kPa,表面传热系数增加到了9,001.6 W/(m^2·K)。当热源表面温度为78.9℃,喷射速率达到0.58 m/s时,散热功率密度可达29.89 W/cm^2。实验结果表明阵列微喷射流液冷冷板具有较好的散热性能,对于高功率密度电子设备冷却有应用前景。

An experimental system aiming at a liquid cooling plate with an array of micro jets has been built in this paper.The liquid cooling plate had an array of13×15circular holes,and the diameter of each hole was0.5mm.The experimental system consisted of water cycling system,heating system and data acquisition system.During the experiments,the heating power varied in eight levels,ranging from200W to550W.As the jet velocity increased from0.22m/s to0.58m/s and the pressure drop increased from59.22kPa to288.38kPa,thesurface heat transfer coefficient increased to9,001.6W/(m2·K).When the surface temperature of heat source was78.9℃,and the jet velocity reached0.58m/s,the heat dissipation rate reached up to29.89W/cm2.The experiment results showed that a liquid cooling plate with an array of micro jets had good heat dissipation capabilities,and it had application prospect in the high power-density electronic device cooling.