摘要
工质热物性显著影响脉动热管的流动与传热特性。本文通过理论计算及实验研究,定性分析了工质热物性对临界直径、毛细滞后阻力、启动运行及传热极限等方面的影响。研究表明,为保证脉动热管的运行性能,在设计阶段应综合考虑工质、管材及管径大小等因素。首先,根据使用场合的热流密度及运行温度高低合理选取工质种类;然后,选用合适的管壁材料,尽可能减少液塞与管壁之间前、后接触角不同引起的毛细滞后阻力;最后,确定管内直径范围。本文工作旨在为脉动热管的设计和选用提供一些依据和参考。
Thermophysical properties of working fluids have profound implications on operational performance of pulsating heat pipes（PHPs）.In this paper,we mainly analyze its effect on critical diameter,capillary hysteresis resistance,start-up and operational limitation.The aim of the work is to give some attentions and reference for designer and user of the PHPs.The present research shows that working fluid,tube material and inner diameter should be considered together during design. At first,proper working fluid should be selected according to the operational temperature and heat flux,and then suitable tube material is taken to avoid the distinct difference in leading and lagging contact angles between liquid plugs and tube wall.Besides,the inner diameter should be determined carefully to guarantee the operational performance of PHPs.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第1期97-99,共3页
Journal of Engineering Thermophysics
基金
东华大学重点学科建设项目资助(No.B604)
关键词
脉动热管
工质热物性
运行性能
影响因素
pulsating heat pipes
thermophysical properties of working fluids
operational perfor mance
influence factors
