The heat transfer performance of a composite porous heat pipe (CPHP, 95 mm × 60 mm × 2.5 mm) using a grooved porous structure as capillary wick was studied. Sintered copper powder was used as the main structure of the capillary wick and sintered as grooves. A new type of powder filling method was used to make a capillary wick and can reduce the use of graphite molds. The effects of heating power, wick width (included 20, 25, 30, 35 mm) and copper powder particle size (included 75-96, 96-120, 120-180 μm) on the thermal performance of CPHPs has been studied experimentally. The results showed that the designed flat heat pipe had a fast thermal response speed, and the heat pipe temperature began to stabilize at 250 s. For different wick width heat pipes, the optimized wick width can improve the CPHP's thermal performance due to the high vapor-liquid circulation efficiency, and its limiting power and minimum thermal resistance were 85 W and 0.067 °C/W, respectively. Moreover, according to the results, small particles have greater capillary pressure and lower permeability. When the copper powder particle size decreased, the thermal resistance and limiting power of CPHPs decreased. The limiting power of different structural heat pipes could reach 85 W, and the maximum effective thermal conductivity could reach 8000 W/(m•°C).

研究了使用开槽多孔结构作为毛细管芯的复合多孔热管（CPHP，95 mm×60 mm×2.5 mm）的传热性能。烧结的铜粉被用作毛细管芯的主要结构，并被烧结成凹槽。一种新型的粉末填充方法被用于制造毛细芯，并且可以减少石墨模具的使用。实验研究了加热功率，灯芯宽度（包括20、25、30、35 mm）和铜粉粒度（包括75-96、96-120、120-180μm）对CPHPs热性能的影响。结果表明，所设计的扁平热管具有较快的热响应速度，热管温度开始稳定在250 s左右。对于不同的灯芯宽度热管，优化的灯芯宽度可以改善CPHP' 由于具有高的气液循环效率，其热性能及其极限功率和最小热阻分别为85 W和0.067°C / W。而且，根据结果，小颗粒具有更大的毛细管压力和更低的渗透性。当铜粉粒度减小时，CPHP的热阻和极限功率降低。不同结构的热管的极限功率可以达到85 W，最大有效导热系数可以达到8000 W /（m•°C）。CPHP的热阻和极限功率降低。不同结构的热管的极限功率可以达到85 W，最大有效导热系数可以达到8000 W /（m•°C）。CPHP的热阻和极限功率降低。不同结构的热管的极限功率可以达到85 W，最大有效导热系数可以达到8000 W /（m•°C）。