原子能科学技术2012，Vol.46Issue(1)：26-31,6.
竖直管内蒸汽完全冷凝换热特性的理论研究
Heat Transfer Characteristics of Complete Condensation in Vertical Tube
李勇 1阎昌琪 1李汶蔚 1孙立成1
作者信息
- 1. 哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001
- 折叠
摘要
Abstract
Nusselt model is the theory model for predicting the film condensation of a quiescent vapor along an isothermal vertical plate. When the steam condenses inside a vertical, the interfacial shear stress due to the steam flow tends to accelerate the liquid film and to make it thinner which would induce the prediction by Nusselt theory deviating from the measured heat transfer coefficient. Considering the effect of interfacial shear stress, the Nusselt model for film condensation was modified in this paper. By using the Nusselt model as well as the modified model, the heat transfer characteristics of complete condensation in a vertical tube passive condenser were studied. The results show that the interfacial shear stress can change the flow state of vapor and liquid film inside tube and its influence on condensation can not be neglected. The modified model considers the interfacial shear stress appropriately, so the calculated values agree well with the experimental results.关键词
完全冷凝/界面剪切力/修正模型Key words
complete condensation/interfacial shear stress/modified model分类
能源科技引用本文复制引用
李勇,阎昌琪,李汶蔚,孙立成..竖直管内蒸汽完全冷凝换热特性的理论研究[J].原子能科学技术,2012,46(1):26-31,6.
