Pulsating heat pipes are a relatively newer generation of heat pipe which are wickless thus more economical and less fabrication-intensive. These devices are made of a capillary sized tube bent in a serpentine form to result in a closed system. In this study a single closed loop pulsating heat pipe made of 2 mm internal diameter copper tubing is experimentally investigated for two different bend radii. The performance comparison is made for two fluids – methanol and water, for varying heat loads from 10 W to 100 W, with various inclinations from vertical bottom heated mode to horizontal mode, for a constant fill ratio of 60%. The sharper bend, though making the device more compact, is found to reduce the performance. One of the bend geometries is further investigated for the effect of insulation on the adiabatic sections. The insulation is found to certainly widen the heat load range though a distinct performance improvement is not found. The variation of the frequency of pressure pulsations with respect to the fluid, heat load and inclination is also studied. Additionally, one of the geometry is tested with FC 72 fluid as well to arrive at a correlation for heat flux for varying fluids, heat fluxes and inclinations, covering 116 data points. The performance trends predicted by the correlation are in line with those reported in the literature.

脉动热管是相对较新的一代热管，其是无芯的，因此更经济且制造强度较低。这些装置由弯曲成蛇形的毛细管尺寸的管制成，以形成封闭的系统。在这项研究中，针对两个不同的弯曲半径，对由2 mm内径铜管制成的单闭环脉动热管进行了实验研究。性能比较是针对两种流体（甲醇和水）进行的，其热负荷从10 W到100 W不等，从垂直底部加热模式到水平模式都有不同的倾斜度，恒定填充率为60％。尽管使设备更紧凑，但是弯曲得较锐利，但会降低性能。进一步研究了弯曲几何形状之一，以了解绝热部分的绝热效果。尽管没有发现明显的性能改善，但发现绝热材料确实扩大了热负荷范围。还研究了压力脉动的频率相对于流体，热负荷和倾斜度的变化。此外，还使用FC 72流体对其中一种几何形状进行了测试，以求出涵盖116个数据点的各种流体，热通量和倾角的热通量相​​关性。通过相关性预测的性能趋势与文献报道的趋势一致。还使用FC 72流体对其中一种几何形状进行了测试，以得出变化的流体，热通量和倾角的热通量相​​关性，涵盖116个数据点。通过相关性预测的性能趋势与文献报道的趋势一致。还使用FC 72流体对其中一种几何形状进行了测试，以得出变化的流体，热通量和倾角的热通量相​​关性，涵盖116个数据点。通过相关性预测的性能趋势与文献报道的趋势一致。