【摘要】 为了使热管内的吸液芯同时具有高毛细抽力、低流动阻力及强化传热的特点,文中开发了一种三角沟槽和金属纤维毡相结合的组合式热管吸液芯;针对此结构的吸液芯从毛细抽力、流动阻力和传热特性3个方面进行了理论分析、数值模拟和试验研究,并与三角沟槽吸液芯的特点进行了分析比较。结果表明,此新型组合式吸液芯具有较高的毛细抽力,约为槽高和槽深均为0.8mm的三角沟槽吸液芯的6倍;因为较沟槽吸液芯增加了金属纤维毡,使得流动阻力增大,但同时由于增加了沸腾传热的有效汽化核心,使得热管的传热量和所承受的最大热流密度都得到提高。更多还原

【Abstract】 In order to satisfy the need of high capillary pressure,low liquid flow resistance and enhanced heat transfer of the wick in heat pipe,a groove wick with triangular cross-section and metal felt were combined to form a novel combined wick.Theory analysis,numerical simulation and experimental test were conducted respectively to study the characteristics of capillary pressure,liquid flow resistance and heat transfer of combined wick while comparing with the triangular groove wick.The results indicate that the combined wick can largely increase the capillary pressure which is 6 times more than triangular groove wick whose groove height and groove width are both 0.8mm;through the liquid flow resistance of the combined wick is raised because of the addition of metal felt,the heat transfer capacity and maximum heat flux are increased due to the additional effective nucleation site provided by the melt felt.更多还原