A numerical study was conducted aiming to examine the hydrothermal performance of a heat sink having hemispherical pin fins (HSPFs) under fully turbulent flow conditions and to find the optimum HSPFs configuration. In the first stage, a heat sink having staggered arranged cylindrical pin fins (CPFs) was selected as the reference case, and the numerical procedure followed in the present study was validated. In the second stage, the hydrothermal performance of solid-HSPs was numerically investigated and compared with the performance of the reference case. The highest the hydrothermal performance factor (HTPF) was found as 1.87 for the fin diameter (d) to channel height (H) ratio (d/H = 0.833), and Reynolds number (Re = 21,367). This configuration was selected as the base case, and in the last stage, its hydrothermal performance was augmented through the perforation technique. The effects of six different perforation patterns having a various number of holes on the hydrothermal performance were investigated in detail. The highest HTPF was obtained as 1.98 which is around %5.6 times higher than the base case, for the pattern with the most holes. In addition, with the proposed HSPFs configuration, the volume of the heat sink was reduced up to 76% compared to the reference case.

进行了一项数值研究，旨在检查具有半球形针状翅片（HSPF）的散热器在完全湍流条件下的水热性能，并找到最佳的HSPFs配置。在第一阶段，选择具有交错排列的圆柱状针状翅片（CPF）的散热器作为参考案例，并验证了本研究中遵循的数值程序。在第二阶段，对固态HSP的水热性能进行了数值研究，并将其与参考案例的性能进行了比较。翅片直径（d）至通道高度（H）的最高水热性能因子（HTPF）为1.87。比值（d / H  =  0.833）和雷诺数（Re  =  21,367）。选择此配置作为基本案例，并在最后阶段通过穿孔技术增强了其水热性能。详细研究了具有不同数量孔的六个不同穿孔方式对热液性能的影响。对于具有最多孔的图案，获得的最高HTPF为1.98，比基本情况高约5.6％。此外，采用建议的HSPF配置，与参考案例相比，散热器的体积减少了多达76％。