化工学报2012，Vol.63Issue(12)：3812-3817,6.DOI:10.3969/j.issn.0438-1157.2012.12.011
竖直大圆管内两相流界面分布机理
Mechanistic study on interfacial area concentration profile of vertical two-phase flow in large circular pipe
摘要
Abstract
Characteristics of interface distribution in air-water two-phase bubbly flow in a vertical pipe was experimentally investigated by using the measurement method of optical fiber probes. The inner diameter of the circular pipe was 100 mm,and superficial gas and liquid velocities ranged from 0 to 0. 1 m o s-1 and from 0 to 1. 0 m o s-1 ,respectively. Local distributions of the interfacial area concentration (IAC) ,void fraction and bubble diameter were obtained. By analyzing the forces on a bubble,it was found that lift force and turbulent dispersion force determined the radial motion of bubbles,and the former dominated the radial profile of IAC. When the bubble diameter exceeded the critical size of 5. 7 mm,the distribution of IAC would change from wall peak to core peak resulting from the lift force pointing to the pipe center due to lift force coefficient changing from positive to negative.关键词
界面面积浓度/大管径/升力Key words
interfacial area concentration/large diameter pipe/lift force分类
能源科技引用本文复制引用
孙波,孙立成,幸奠川,刘靖宇,田道贵..竖直大圆管内两相流界面分布机理[J].化工学报,2012,63(12):3812-3817,6.基金项目
国家自然科学基金项目(51076034) （51076034）
重点实验室基金项目(HEUFN1102) （HEUFN1102）
中央高校科研专项基金项目(HEUCFZ1122). （HEUCFZ1122）
