大连理工大学学报2026，Vol.66Issue(2)：111-118,8.DOI:10.7511/dllgxb202602001
基于时移多尺度等概率符号化样本熵的气液两相流动态特性分析
Analysis of dynamic characteristics in gas-liquid two-phase flow based on time-shift multiscale equiprobable symbolic sample entropy
摘要
Abstract
To reveal the differences in complexity and instability between gas-liquid two-phase flow structures,an analysis method based on time-shift multiscale equiprobable symbolic sample entropy(TMESSE)is proposed.Based on the analysis of seven typical time series,the feasibility and effectiveness of the proposed method are fully verified;subsequently,an in-depth analysis is conducted on the differential pressure fluctuation time series of gas-liquid two-phase flow in a vertical upward pipe.The results indicate that the distribution trend of TMESSE entropy values can characterize the evolutionary characteristics of different flow patterns across multiple scales.Furthermore,the joint distributions of the TMESSE mean value and the complexity indices can qualitatively depict the differences in flow instability under different conditions and,on this basis,quantitatively map the comprehensive instability degree of gas-liquid two-phase flow structures across multiple scales.关键词
时移多尺度/符号化/样本熵/两相流/动态特性Key words
time-shift multiscale/symbolic/sample entropy/two-phase flow/dynamic characteristics分类
数理科学引用本文复制引用
孙庆明,张玉玮,巴頔,李振谭,夏雨蒙,杜洋..基于时移多尺度等概率符号化样本熵的气液两相流动态特性分析[J].大连理工大学学报,2026,66(2):111-118,8.基金项目
黑龙江省省属本科高校基本科研业务费资助项目(145109204,145109411). （145109204,145109411）
