管束间压差波动信号的混沌特性研究

Chaotic Characteristics Analysis of Differential Pressure Fluctuating Signal across Tube Bundles

以空气-水为实验介质,采集了不同流型工况下气液两相流体向上横掠水平管束时的压差波动信号,将每一组压差信号作为一组时间序列,对其进行混沌特性分析,包括关联维数的求取与HURST指数的分析。结果表明,空气-水向上横掠水平管束的压差波动信号具有混沌特征,能够用来表征气液两相流的典型流型。

With air and water for the test medium,the differential pressure fluctuations are measured at different flow regime across tube bundles. The differential pressure fluctuations signal each group was extracted to compose the time series,then its chaos were analyzed,including to analyze the correlation dimension and the index of HURST index. The test results showed that the differential pressure fluctuations signal of gas-water two-phase flow across the vertical upward tube bundle was of chaos characteristics, which could be well used to characterize the two-phase flow type of a flow.