中南大学学报（自然科学版）2017，Vol.48Issue(5)：1391-1397,7.DOI:10.11817/j.issn.1672-7207.2017.05.035
热虹吸管相变传热行为CFD模拟
CFD modeling of phase change heat transfer behaviors in thermosyphons
摘要
Abstract
A computational fluid dynamic (CFD) model based on the volume of fluid (VOF) multiphase model and an improved phase change model were developed to simulate the phase change heat transfer process in thermosyphons at steady state, and the modeling results were validated by measuring wall temperature distribution and visualization experiments. Besides, the influence of filling ratio (FRs) on the evaporation-condensation behavior in thermosyphons was analyzed. The results show that this CFD model can reproduce both the vaporization and condensation processes well. The predicted temperature distribution show better consistency with experimental results using the improved phase change model, the maximum deviation of average temperature at different sections being 10.2 K with a relative deviation of 2.9%. Furthermore, the predicted flow regimes are generally in agreement with the observed phenomenon in visualization testing. Filmwise condensation is the main heat transfer mode at condenser area in thermosyphons which is not affected by FRs. However, the variation of FRs considerably affects the heat transfer behavior at evaporator and thus changes the heat transfer performance of thermosyphons. This study is conducive for understanding the operating mechanism of thermosyphons and meanwhile provides some guidance for its CFD modeling.关键词
热虹吸管/相变传热/CFD/可视化Key words
thermosyphon/phase change heat transfer/computational fluid dynamic (CFD)/visualization分类
能源科技引用本文复制引用
王啸远,朱跃钊,陈海军,王银峰,范红途..热虹吸管相变传热行为CFD模拟[J].中南大学学报（自然科学版）,2017,48(5):1391-1397,7.基金项目
国家自然科学基金资助项目(51276086) （51276086）
国家科技支撑计划项目(2014BAJ01B06) (Project(51276086) supported by the National Natural Science Foundation of China （2014BAJ01B06）
Project(2014BAJ01B06) supported by the National Science and Technology Support Program of China) （2014BAJ01B06）
