Visualization of Thermo-Hydrodynamic Behavior in Flat-Plate Pulsating Heat Pipe with HFE-347

• 作者: YAN Lipei ZHANG Ping XU Hui MA Wei SHENG Jiang
• 来源期刊: 热科学学报（英文版）
• 年，卷（期）: 2021,（3）
• 页码范围: 926-938
• 页数: 13页
• 语种: 英文

摘要

In this paper,the visualization of the thermo-hydrodynamic behavior in flat-plate pulsating heat pipe (FP-PHP) with HFE-347 is experimentally investigated.The FP-PHP is vertically placed with filling rate of 20％ to 70％ and heating power of 20 W to 140 W.A high-speed camera is used to record the two-phase flow in the FP-PHP.Four flow pattern types and four flow directions are observed.The flow directions of the two-phase flow inside the FP-PHP with medium filling rate (40％-60％) are the most complex,and the FP-PHP with high filling rate (70％) is most likely to form a directional circulating flow.At high heating power (100 W to 140 W),the flow patterns in FP-PHP with medium (40％-60％) and high filling rate (70％) are dominated by mixed flow.The wall temperature fluctuates greatly at moderate heating power (60 W to 80 W) owing to the uncertainty of the flow direction.The temperature distribution of the FP-PHP is highly affected by the heat transfer intensity of the working fluid under different flow states,so that the state of fluid flow and the thermal performance of FP-PHP can be evaluated through the infrared thermal image of the FP-PHP.