钝体尾迹波动时频熵在气液两相流流型识别中的应用（英文）

被引：6

作者：

黄思师

孙志强

周天

周孑民

机构：

[1] SchoolofEnergyScienceandEngineering,CentralSouthUniversity

来源：

JournalofCentralSouthUniversity | 2018年 / 25卷 / 07期

关键词：

气液两相流; 尾迹波动; 流型图; 时频熵; 集总经验模态分解; 希尔伯特变换;

D O I：

暂无

中图分类号：

O359 [多相流];

学科分类号：

080704 ;

摘要：

气液两相流广泛存在于工业过程及设备之中,其流型识别在多相流检测领域发挥着至关重要的作用。本文提出将钝体放置于流道增加扰动以放大各流型间特征的差异。以常温常压下不同比例混合的水和空气作为实验工质在水平管道中进行实验,获得了泡状流、泡塞流、塞状流、弹状流和环状流等流型下的钝体尾迹波动差压信号;利用自适应的集合经验模态分解方法和希尔伯特变换,得到了压差信号的时频熵S;通过结合S和其他流动参数,如体积含气率β、质量含气率x、密度比φ和液相修正系数ψ,采用S(1–x)φ和(1–β)ψ分别作为纵坐标和横坐标,构造了一个新型流型图。实验数据验证表明该流型图的识别率可达92.9%。本研究为气液两相流的流型识别提供了一种简单有效的解决方法。

引用

页码：1690 / 1700

页数：11

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