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Multi-Fractal Detrended Fluctuation Analysis of Fluctuation Signal of Gas-Liquid Two-Phase Flow
Author(s): 
Pages: 795-798
Year: Issue:  5
Journal: Journal of Engineering Thermophysics

Keyword:  气液两相流 流型 多重分形 去趋势波动分析 动力学特性;
Abstract: 为了研究不同流型压差波动信号的分形特征,本文首先讨论了多重分形去趋势波动分析对周期信号、随机信号和混沌信号的识别能力,然后运用多重分形去趋势波动分析方法对水平管内气-液两相流压差波动信号进行分析。通过计算广义Hurst指数、尺度函数、多重分形谱,细致量化了压差波动信号的局部及不同层次的波动奇异性。研究结果表明:压差波动信号具有长程相关性,而且是多重分形过程,多重分形谱参数可以反映不同流型的动力性特征。压差波动信号的多重分形分析有助于进一步理解流型转化的动力学特性。
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