仿蜂巢复合吸液芯均热板的热工水力性能

Thermal-hydraulic Performance of Bionic Honeycomb Composite Wick Vapor Chamber

本文针对高热流密度下的电子设备散热问题,在传统蒸汽腔(VC)均热板基础上提出了一种由冷凝端芯和具有仿蜂巢结构蒸汽通道的蒸发端芯组成的复合吸液芯结构。采用数值方法研究了传统径向槽道吸液芯VC均热板和仿蜂巢结构复合吸液芯均热板内的流动和传热性能,并进行了实验验证。结果表明:仿蜂巢复合吸液芯均热板的热工水力性能优于传统VC均热板,仿蜂巢通道为气液相工质提供了多条流动路径,使均热板温度分布更均匀;其传热性能先随热负荷的增大而提高,当热负荷高于60 W时,传热性能由于内部流体流动受阻而下降。

Focusing on the electronic equipment heat dissipation problem under high heat flux density,a bionic composite wick structure consisting of a condenser wick and an evaporator wick with honeycomb-like vapor channels is proposed based on traditional vapor chambers(VC).The flow and heat transfer performance of traditional VC and the bionic composite wick structure are numerically studied in this work,and experimental verification is also carried out.The research results show that thebionic honeycomb channels of the composite wick provide multiple flow paths for the working liquid and vapor,which makes the temperature distribution more uniform.With increasing heat load,the heat transfer performance of the bionic composite wick vapor chamber first increases,but decreases due to internal flow resistance when the heat load is larger than 60 W.