摘要
应用两相流和溶液热力学的基本理论对热虹吸提升管的流动特性进行了分析研究,采用两相流分相模型对其进行了数值计算,得出了对应不同截面、不同浸没高度下加热负荷与浓溶液的提升量、蒸汽发生量、浓溶液最大提升高度及稀溶液最小浸没高度的关系曲线.分析结果表明:在小加热负荷下(7.0 kW左右),直径比为19/32的组合套管的提升高度优于其他套管,最大提升高度高于直径比为16/32的组合套管.计算结果与实验结果符合良好,为该类型热虹吸泵的设计和运行提供了依据.
The flow characteristics of thermosyphon elevation tube are investigated following the fundamental theory of two-phase flow and solution thermal dynamics. The separated phase flow model for two phases is applied to numerical simulation. The relationships of heat load with amount of elevated solution, amount of vapor, the maximum height of elevated solution, the minimum submersed depth of solution at different cross section and different submersed depth, are plotted to indicate that the elevation effect of the pipes with diameter ratio 19/32 outperforms the others, and the maximum height of elevated solution is higher than 16/32 pipes. The numerical predictions coincide well with the experimental data.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2008年第1期17-22,共6页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(50176036,50276048)
陕西省自然科学基金资助项目(2006E142)
关键词
两相流
热虹吸
分相模型
数值计算
two-phase flow
thermosyphon
separated phase flow model
numerical simulation
