摘要
在内径26 mm、长2 000 mm的水平管内,用差压变送器测量气液两相流不同流型下的压差波动信号,通过小波变换对信号进行除噪后,运用确定性混沌分析技术对信号进行分析,研究两相流系统分层流、泡状流、间歇流和环状流压差波动信号的混沌动力学行为.结果表明,气液两相流动系统为混沌动力系统,吸引子可用来表征气液两相流系统的动力学行为,混沌特征参数关联维D2和K熵可用来定量识别以上4种流型.
In a horizontal pipe with a length of 2 000 mm and an inner diameter of 26 mm, differential pressure fluctuations are measured at different flow regimes. The noises in the signals are filtered by wavelet transform. The characteristics of the differential pressure fluctuation in the gas - liquid two-phase flow are analyzed by using deterministic chaos theory. The hydrodynamic behavior of the dispersed flow regime, the bubble flow regime, the intermittence flow regime, and the annular flow regime in a gas -liquid two phase system are investigated. It is shown that the two-phase flow system is chaotic and the hydrodynamic behavior of this system can be presented by the chaotic attractors. The characteristics of above four regimes can be quantitatively identiffed by correlation dimension and Kolmogorov entropy.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2006年第11期1963-1967,共5页
Journal of Harbin Institute of Technology
基金
吉林省科技发展计划资助项目(20040513)
关键词
气液两相流
压差波动
流型
混沌吸引子
关联维数
Kolmogorov熵
gas -liquid two-phase flow
differential pressure fluctuation
flow regime
chaotic attractor
cor- relation dimension
Kolmogorov entropy
