起伏振动状态下水平管内两相流多尺度熵分析

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (20) : 260-265.

论文

周云龙，常赫，赵盘

作者信息 +

Multi-scale entropy analysis of two-phase flow in a horizontal pipe under heaving motion

ZHOU Yunlong, CHANG He, ZHAO Pan

Author information +

文章历史 +

摘要

将振动装置与气液两相流实验回路相结合，对起伏振动状态下水平通道内气液两相流进行实验研究，观察记录流型并此采集压差波动信号。同时采用多尺度熵方法对102种流动条件6种流型的压差波动信号进行分析。研究结果表明：起伏振动状态下水平管内主要流型包括泡状流、珠状流、炮弹流、弹状-波状流、沸腾波状流及环状流。利用小尺度下样本熵的变化速率特征可以明显区分水平通道内气液两相流型，而大尺度下样本熵的变化特征可以反映不同流型的动力学特性。

Abstract

According to the method of combining vibration apparatus with two-phase flow experiment loop, an experimental study on the gas-liquid two-phase flow in a horizontal tube under heaving motion was conducted.Flow regime and pressure fluctuation signal were recognized.Meanwhile, pressure fluctuation signal was analyzed by the method of multi-scale entropy under 102 different flow conditions.The results show that the main flow patterns are found as beaded flow, slug flow, shell flow, wave flow, and annular flow.The changing rate of sample entropy at small scales can be used to classify typical flow regime, and the fluctuation of entropy of large scales reflects the dynamic characteristics of different flow regimes.

导出引用

周云龙，常赫，赵盘. 起伏振动状态下水平管内两相流多尺度熵分析[J]. 振动与冲击, 2019, 38(20): 260-265

ZHOU Yunlong, CHANG He, ZHAO Pan . Multi-scale entropy analysis of two-phase flow in a horizontal pipe under heaving motion[J]. Journal of Vibration and Shock, 2019, 38(20): 260-265

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