气液两相流流型信号的分形特征分析

对气液两相流流型的最化描述是气液两相流流型识别的关键问题。在室内气液两相流综合试验环道上，对气流两相水平管流中分层波状流向段塞流的转变过程进行了测试，采用了基于小波变换的分形理论对流型信号整体与局部的相似性进行了量化分析。结果表明，分层波状流和段塞波信号的分形维数之间存在显著差异，其分形维数可以作为流型量化描述的一个新指标。

The Fractal Feature of Gas-liquid Two-phase Flow Pattern Signals Based on Wavelet Transform

Flow pattern quantization formulation is a key to gas-liquid two-phase flow pattern identification, A general gas-liquid two-phase flow experimental facility is established to obtain flow pattern signals in the transition between stratified wavy flow and slug flow. Fractal dimensions of these flow pattern signals are calculated with fractal theory based on wavelet transform. It is proven that the difference between fractal dimensions of the two flow pattern signals is enough to be considered as a new quantization symbol for flow pattern identification.