热力发电2018，Vol.47Issue(6)：57-63,7.DOI:10.19666/j.rlfd.201709191
水平管外冷态降膜流动特性研究
Study on flow characteristics of cold-state falling film outside horizontal tubes
张友森 1张建丽 2李会雄 1杨庆卫 2周彪1
作者信息
- 1. 神华国华(北京)电力研究院有限公司,北京 100025
- 2. 西安交通大学能源与动力工程学院,陕西 西安 710049
- 折叠
摘要
Abstract
The calculation model of cold-state falling film flow outside horizontal tubes is established by volume of fluid(VOF)method.The distribution rules of liquid film thickness and velocity outside horizontal tubes under the flowing cold-state falling film condition are studied.Effects of sprinkle density,cross section position and distance from wall on velocity field are analyzed.The results of numerical calculation show that the flow velocity of liquid film outside horizontal tubes increases with the increasing sprinkle densities.The circumferential velocity of liquid film increases with the increasing circumferential angle at the cross section of falling film column.Moreover,the circumferential velocity of liquid film at middle cross section between adjacent falling film columns shows an ascending tendency with the increasing circumferential angle.The circumferential velocity of liquid film increases fast with the angle in the range of 30° to 110°,while the circumferential velocity of liquid film is smoothly changed in the range of 120° to 150°.关键词
VOF方法/喷淋密度/水平管外降膜/冷态流动/液膜厚度分布/传热系数/流速分布Key words
VOF method/sprinkle density/falling film outside horizontal tubes/cold-state flow/liquid film thickness distribution/heat transfer coefficient/flow velocity distribution分类
能源科技引用本文复制引用
张友森,张建丽,李会雄,杨庆卫,周彪..水平管外冷态降膜流动特性研究[J].热力发电,2018,47(6):57-63,7.
