水平管道中液塞长度波动的非线性分析

The Nonlinear Analysis of Liquid Slug Length Fluctuation in Horizontal Pipe

利用非线性分析技术中的分形理论在较宽的流速范围内对水平管空气 水段塞流中的液塞长度波动特性进行了研究。结果表明 ,水平管道段塞流的液塞长度符合对数正态分布 ,其波动是对初始条件敏感的混沌振荡 ,遵循分形统计规律 ,且具有持久性。通过对不同折算液速下的液塞长度波动特性的分析发现 ,液塞长度波动的混沌程度及波动对初始条件的依赖性在混合速度为 1 1m

The fluctuation characteristics of liquid slug length was investigated on the basis of fractional theory of air/water slug flow in the horizontal pipe with a large range of gas and liquid velocities.The results indicate that the distribution of liquid slug lengths can be well fitted by log-normal distribution,and the fluctuation of liquid slug lengths is characterized with chaotic vibration which are sensitively dependent on initial conditions.Meantime,the fluctuations with permanence properties’ obey fractional statistics. By carrying out an analysis about the fluctuations of liquid slug lengths at two superficial liquid velocities,the chaotic degree and the sensitivity to initial conditions of the fluctuations will have extremums while superficial mixture velocity U m=11 m/s.