垂直上升管内空气-水两相流压差波动信号的Hurst指数分析  

Hurst's Analysis for Differential Pressure Fluctuation signal of Gas - Liquid Two - Phase Flow in Vertical Upward Tube

作　　者：关跃波[1] 周云龙[1] 孙斌[1] 

机构地区：[1]东北电力学院动力系,吉林吉林132012

出　　处：《东北电力学院学报》2005年第6期14-17,共4页Journal of Northeast China Institute of Electric Power Engineering

基　　金：吉林省科技发展计划资助项目(No.20040513).

摘　　要：对垂直上升管内空气-水两相流的压差信号进行测量,得到了反映两相流波动特性的压差波动信号。采用Hurst分析描述了管内气液两相流不同流型的压差波动特征,发现压差波动信号中存在着不同程度的周期成分。通过对不同流型的压差波动信号的Hurst指数H进行计算,发现不同流型的H值有很大差别,可根据Hurst指数H值的大小来识别流型,为流型识别提供了一种新的有效方法。In order to overcome the shortcoming of traditional methods, the differential pressure fluctuation signals of gas-llquld two-phase in vertical up ward tube were obtained and the characters of the signals were described by means of Hurst＇ s analysis. The result showed the periodic component was found in the differential pressure fluctuation signal. By calculating the Hurst exponents of signals of different flow pattern, the distinct difference of Hurst exponents among various flow patterns can be obtained. Therefore flow patterns can be identified by Hurst exponents,and a new efficient method is propoced to choose for flow pattern identification.

关 键 词：气液两相流 压差波动 Hurst分析 流型 

分 类 号：O359.1[理学—流体力学]