【摘要】 提出了一种具有内插物的新型重力热管,该热管避免了流体的逆流流动.实验观察和传热性能的实验研究表明,其操作稳定,传热性能良好,具有较高的临界热通量.在分析以乙醇、水为介质的实验数据基础上,给出了该热管的设计计算方法及改进的环隙并流冷凝传热模型.更多还原

【Abstract】 A new two-phase closed thermosyphon without countercurrent flow was designed by inserting inner tubes in both the boiling and condensation sections and a stream distributer in the adiabatic section. A visual study was carried out and the heat transfer performance of such a thermosyphon was investigated. A fluid flow model (physical as well as mathematical) was proposed and tested in the visual observation and heat transfer experiment. Theoretical analyses and experimental investigations showed that the new two-phase closed thermosyphon not only had a higher stability in operation and a higher critical heat flux, but also had better heat transfer perfomance. A condensation model with vapor and liquid flowing cocurrently in annulus based on the Spliman et al’s model was proposed and the mean deviation between the model and the experiments was 19.4%.The main points oi its design were discussed.更多还原