原子能科学技术2017，Vol.51Issue(5)：851-857,7.DOI:10.7538/yzk.2017.51.05.0851
棒束通道气液两相流流型识别及动力学特性分析
Flow Pattern Identification and Dynamics Characteristics of Gas-liquid Two-phase Flow in Rod Bundle Channel
周云龙 1尹洪梅1
作者信息
- 1. 东北电力大学 能源与动力工程学院,吉林 吉林 132012
- 折叠
摘要
Abstract
Four differential pressure signals of gas-liquid two-phase flow pattern in a rod bundle channel were collected and the multiple scale marginal spectrum entropies of four kinds of flow patterns were calculated, then the identification and dynamics characteristics of four kinds of flow patterns were analyzed.The experimental results show that multiple scale marginal spectrum entropy can distinguish four kinds of flow patterns from the whole, and the dynamics characteristics of different flow patterns can be revealed quantitatively from the detailed scale of frequency domain.The four kinds of flow patterns can be accurately distinguished by using multiple scale marginal spectrum entropy rate and spectral entropy mean joint distribution, and the bubbly and churn flow that it is difficult to distinguish such transitional flow also has a good effect.Combining with the support vector machine, the method has the advantages of fast operation and high recognition rate, its accuracy rate is up to 98.11%, and is suitable for online identification of flow patterns.关键词
棒束通道/气液两相流/流型识别/动力学特性Key words
rod bundle channel/gas-liquid two-phase flow/flow pattern identification/dynamics characteristic分类
能源科技引用本文复制引用
周云龙,尹洪梅..棒束通道气液两相流流型识别及动力学特性分析[J].原子能科学技术,2017,51(5):851-857,7.
