汞-水混合工质脉动热管实验研究  

Experimental study of pulsating heat pipe with mercury and water as working fluid

作　　者：胡建军[1] 徐进良[1] 

机构地区：[1]中国科学院广州能源研究所

出　　处：《化工学报》2008年第5期1083-1090,共8页CIESC Journal

基　　金：国家自然科学基金项目(50476088)~~

摘　　要：在恒定加热功率条件下,考察了不同倾斜角时蒸发段壁面温度的脉动情况,发现了汞-水脉动热管微倾角起振的特性;在相同充液比下,对比了汞-水混合工质与纯水工质脉动热管在微倾角时的运行特性;对比了不同倾斜角下汞-水脉动热管的传热性能。实验结果表明:工质汞的掺入能够有效辅助脉动热管的微倾角起振,增加了脉动热管应用的灵活性。传热热阻随加热功率的增加而减小,而在高加热功率下,热阻大小基本不受倾斜角影响。实验中还发现汞-水脉动热管起振的临界热通量与热载荷施加的历史有关。Experimental investigation was conducted on closed-loop pulsating heat pipe （CLPHP） working with a mixture of water and mercury. The temperature fluctuation of the evaporator section at different inclination angles was measured at constant heating load, and the phenomenon of start-oscillation in micro inclination angles was observed. Then the operation characteristics of Hg-H2O PHP and pure H2O PHP was compared in the same fill ratio. Lastly, a comparison of heat transfer performance of Hg-H2O PHP with different inclination angles was made. The results showed that the addition of mercury into water effectively assisted the start-oscillation in micro inclination angles which increased the application flexibility of the PHP system. Thermal resistance decreased as heating load increased. Up to a certain magnitude, different inclination angles had very close thermal resistance. It was discovered that the critical heat flux of start-oscillation was related to heating history.

关 键 词：闭式脉动热管 电子冷却 起振机理 温度脉动 传热性能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]