中国电机工程学报2011，Vol.31Issue(5)：84-89,6.
顺列管束间气液两相流型及压降特性研究
Investigation on Gas-liquid Two-phase Flow Patterns and Pressure Drop Across an In-line Tube Bundles
洪文鹏 1刘燕 1任静秋1
作者信息
- 1. 东北电力大学能源与动力工程学院,吉林省,吉林市,132012
- 折叠
摘要
Abstract
A high-speed video camera was used to study the flow patterns in the rectangular channel of vertical upward cross-flow of air and water in horizontal tube bundles.Experiments were conducted using in-line tube bundles with a pitch-to-diameter ratio of 1.3 and 1.8. Bubbly flow, intermittent flow and mist flow were identified by flow visualization, and a flow map was constructed as a function of gas and liquid superficial velocities. Comparison with previous studies revealed good agreement at low gas and liquid velocity. A comparative analysis of pressure drop of different flow pattern of both tube bundles was done. The results show that: the pressure drop of bubble flow is maximum, which is followed by intermittent flow and mist flow becomes the minimum.When the void fraction range from 0.15 to 0.67, the fluctuation pressure drop of tube bundles which with a pitch-to-diameter ratio of 1.3 is higher than the one with a pitch-to-diameter ratio of 1.8, and when the void fraction is bigger than 0.67 or smaller than 0.15, the pressure drop of large pitch ratio is less than the small pitch ratio. Based on the statistical analysis of the different pressure signals, the power spectrum density versus frequency of the signals for major flow patterns was obtained.It is found that the flow patterns can be identified in accordance with the power spectrum density.关键词
气液两相流/顺列管束/高速摄像/流型/压降特性分类
数理科学引用本文复制引用
洪文鹏,刘燕,任静秋..顺列管束间气液两相流型及压降特性研究[J].中国电机工程学报,2011,31(5):84-89,6.
