摘要
提出了一种改进的气泡起飞直径计算方法,用以表征天然气液烃在管道输送过程中流动沸腾的气液相间传热传质速率。考虑作用在气泡上的不稳定阻力、剪切升力、浮升力以及管道倾角等因素,基于受力平衡原理和气泡脱离壁面的临界条件,建立了新的气泡起飞直径模型,在此基础上分析了管道倾角对气泡起飞直径的影响情况。结果表明:文中模型计算的水平、垂直管道中气泡起飞直径与实验值的平均相对偏差分别为10.07%和5.1%,精度优于目前常用的Fritz,Cole,Kocamustaf,Farajisarir,Golorin,Kirichenko和Borinshansky-Fokin(B-F)模型。该模型还弥补了现有方法不能计算倾斜管道气泡起飞直径的不足。
An improved bubble lift-off diameter calculation method was proposed to represent the boiling heat and mass transfer rate between vapor and liquid phases in natural gas liquids transmission pipelines.With the consideration of many factors including the unstable resistance,shear lift,buoyancy force acting on the bubble,and the pipeline inclination,a new bubble lift-off diameter model was built based on the force-balance principle and the critical condition of the bubble escaping from the wall surface.Also,the effect of the pipe inclination angle on the bubble lift-off diameter was analyzed.The results show that,the average relative deviation between the calculated values and the experimental data for the horizontal pipelines and the vertical pipeline is equal to 10.07%and 5.1%,respectively,which is more accurate than seven existing models,including Fritz,Cole,Kocamustaf,Farajisarir,Golorin,Kirichenko and Borinshansky-Fokin(B-F)models.Moreover,this model overcomes the shortcomings of existing methods that cannot be applied to calculate bubble lift-off diameters for inclined pipelines.
作者
罗强
贾文龙
杨帆
唐海丽
LUO Qiang;JIA Wen-long;YANG Fan;TANG Hai-li(School of Petroleum Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2019年第6期53-57,共5页
Chemical Engineering(China)
基金
国家自然科学基金青年基金项目(51504206
51604233)
国家自然科学基金面上项目(51474184)
关键词
天然气液烃
管道
气液两相流
气泡
起飞直径
natural gas liquids
pipe
vapor-liquid two-phase flow
bubble
lift-off diameter
