作　　者： ; ;

机构地区： 西安交通大学

出　　处： 《核动力工程》 1995年第2期154-160,共7页

摘　　要： 本文在分析压水堆小破口失水事故中蒸汽发生器回流冷凝传热机理的基础上，针对界面切应力的影响，修正了Ｎｕｓｓｅｌｔ冷凝传热模型，并成功地编制了计算程序，获得了多种工况的传热计算结果．通过与经典的Ｎｕｓｓｅｌｔ数值解的比较，揭示了界面切应力对传热的影响程度。计算同时也证明，冷凝回流是一种很有效的传热方式，它在很小温差下能带走堆芯大量余热。本文为反应堆小破口事故中回流冷凝的模拟提供了理论依据． Based on PWR LOCAs reflux condensation heat transfer mechanism, considering the effect of shear stress, a correlation is provided for classical Nusselt condensation model, and corresponding results are numerically calculated. After analysis and comparison with Nusselt solution, divarications under various conditions, especially different pressures are revealed. It's aLso proved that reflux condensation is very effective even under small temperature difference.The paper provides theory basis for LOCAs reflux condensation modeling.

关 键 词： 圆管 切应力 冷凝 传热

领　　域： [动力工程及工程热物理] [动力工程及工程热物理] [核科学技术]