下倾管中活塞流液塞长度波动特性  

Fluctuation characteristics of liquid slug length for slug flow in downward inclined pipeline

作　　者：罗小明[1] 何利民[1] 王海琴[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东东营257061

出　　处：《化工学报》2006年第3期536-540,共5页CIESC Journal

摘　　要：通过采集下倾管中活塞流的差压信号,应用互相关法分析得到液塞长度时间序列.利用统计理论与分形理论分析液塞长度时间序列来揭示液塞长度波动特性.结果表明:气相折算速度对液塞长度的影响远大于液相折算速度.液相折算速度较大时,随着混合速度的增加,液塞长度波动的混沌程度增加;而液相折算速度较小时,随着混合速度的增加,液塞长度波动的混沌程度减小.在管线下倾角较大的情况下,液塞长度分布集中在较小的范围内.管线下倾角越大,液塞长度波动的长程相关性越好.The differential pressure signal of slug flow was gathered in a downward inclined pipe, and the time series of liquid slug length was obtained by utilizing the cross correlation analysis. The fluctuation characteristics of liquid slug length was discovered by using the statistics theory and fractal theory to analyze the time series of liquid slug length. The results showed that the effect of gas superficial velocity on liquid slug length was greater than the effect of liquid superficial velocity. When the liquid superficial velocity was relatively high, with increasing mixture velocity, the chaos of liquid slug length fluctuation would increase. When the liquid superficial velocity was relatively low, with increasing mixture velocity, the chaos of liquid slug length fluctuation would decrease. On the condition of a larger pipe inclination angle, the distribution of liquid slug lengths was more concentrated in a smaller range. The larger the inclination angle was, the better the long range dependence of liquid slug length fluctuation was.

关 键 词：下倾管 活塞流 液塞长度 统计 分形 

分 类 号：O359.1[理学—流体力学]