摘要
应用电导断层测量技术研究表面活性剂添加对倾斜上升气液两相流流型的影响,实验工质为空气/水、空气/100 mg/kg十二烷基硫酸钠(SDS)水溶液。结果表明,当倾角较小时(2.5°和5°),添加少量纯度为95％的SDS到空气/水两相流系统,可以推迟了分层流型向环状流型的转换,使其发生在较高的气体流速条件下;与水平流动的实验结果类似,在本文的实验条件下没有观测到表面活性剂对塞状流型、弹状流型转换特性的影响。随着倾角的增大(10°),表面活性剂添加对气液两相流流型的影响更为显著,在空气/水气液两相流系统中没有观测到分层流动,而加入表面活性剂后在一定范围内存在分层流动。
This paper presents investigations on the effect of a surface active agent on the characteristics of air/water two-phase flow in horizontal and inclined pipe using the electrical conductive tomographic technique. Air/water and air/100 mg/kg sodium dodecyl sulphate (with 95% purity grade) aqueous solution are used as working fluids. For 2.5° and 5° pipe inclinations, the surfactant has obvious effect on the transition from stratified wavy flow to annular flow. For 10° pipe inclination, no stratified flow regime is observed in the air-water flow. In the air-surfactant solution system, however, stratified flow regime has been found to exist in the range of USG= 10 ~ 28 m/s and USL = 0.07 ~ 0.2 m/s. No obvious change is observed for the transition between plug flow regime and slug flow regime.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第4期613-615,共3页
Journal of Engineering Thermophysics
基金
北京市科技新星计划资助项目(No.954810800)
北京市教委科技发展项目(KM200410005008)
关键词
表面活性剂
断层测量
两相流
流型
surfactant
tomography
two-phase flow
flow regime
