电子束表面造型对液冷冷板散热性能影响研究

为了获得电子束表面造型对液冷冷板散热性能的影响规律,对带有柱状表面造型的液冷冷板进行数值模拟。结果表明,当冷却液通道中存在柱状表面造型时,可有效提高冷板的散热性能,其中造型高度对冷板的散热性能影响最大,造型流向间距的影响其次,造型直径的影响最小;当柱状造型直径1mm、高度6mm且相邻造型的流向间距为4mm时,冷却液与模拟发热芯片的温差为46.08℃,该冷板的散热性能与空白试样对比可提升23.23%。之后根据模拟结果,制备了具有不同表面造型特征的液冷冷板试样,散热性能测试结果表明,通道内制备柱状造型可提高冷板散热性能达13%以上;但当柱状造型高度<4mm,且造型数量较少时,改变柱状造型特征对提升冷板散热性能的影响较小。

Study on Influence of Electron Beam Surfi-Sculpt on Cooling Performance of Liquid-Cooling Cold Plate

In order to obtain the law of the influence of the electron beam surfi-sculpt on heat dissipation performance of liquid-cooling cold plate,the numerical simulation of liquid-cooling cold plate with cylindrical surfi-sculpt was carried out.The results shows that the cooling performance of the cold plate can be effectively improved when the cylindrical surfi-sculpt is in channel of the cold plate.The height of surfi-sculpt has the greatest influence on the heat dissipation performance of cold plate,and the flow direction spacing has the second influence.The influence of the diameter is the least.When the diameter of the cylindrical surfi-sculpt is 1mm,the height is 6mm and the flow direction spacing of the adjacent surfi-sculpts is 4mm,the temperature difference between the cooling liquid and the simulated heating chip is 46.08℃,and the heat dissipation performance of the cold plate can be improved by 23.23%compared with the blank sample.According to the simulation results,the liquidcooling cold plate samples with different surfi-sculpt were prepared.The test results of the heat dissipation performance shows that the heat dissipation performance of the cold plate can be improved by more than 13%when the cylindrical surfi-sculpt is made in the channel.However,when the height of cylindrical surfi-sculpt is less than 4mm and the quantity of surfi-sculpts is a few,the effect of changing the characteristics of surfi-sculpt on improving the heat dissipation performance of cold plate is small.