The Analysis of Gas-Liquid Two-Phase Based on MF-DFA

摘要

In order to study the multi-fractal characteristics of conductance fluctuating signals of the different flow patterns,this paper analyzes conductance wave signals of the vertical rising pipe of gas-liquid two-phase based on multi-fractal detrended fluctuation analysis (MF-DFA).By calculating wave function,generalized Hurst index,scaling function,multi-fractal spectrum parameters,the fluctuation singularity of the conductance fluctuating signals in partial and different levels was quantified in the paper.The results of the study show that: different conductance fluctuating signals have long-range correlation,and are multi-fractal process.Multi-fractal spectrum parameters can reflect the dynamic characteristics of different flow type.We can characterize the flow pattern variation of gas-liquid two-phase flow based on MF-DFA.It is a useful tool to understand flow pattern transition mechanism and its dynamic evolution character.