油水两相流流型混沌吸引子形态特性

Chaotic attractor morphological characteristics of oil-water two-phase flow pattern

基于在垂直上升管中采集到的61组油水两相流电导波动信号,通过在混沌吸引子域中放置参考截面方法,考察了混沌吸引子形态特征量与油水两相流流型转变之间的关系,发现水包油流型在3阶及4阶吸引子矩特征量平面上分布相对稳定,而过渡流型在3阶吸引子矩特征量平面上呈不规则剧烈变化,在4阶吸引子矩特征量平面上呈线性变化。研究结果表明,油水两相流混沌吸引子形态特征量对流型转化敏感,有助于理解油水两相流流型转化的非线性动力学机制。

Based on 61 groups of conductance fluctuating signals in vertical upward oil-water two-phase flow, the relationship between chaotic attractor morphological characteristics and oil-water two-phase flow pattern transition was investigated by placing reference sections in the chaotic attractor field. The oil-inwater flow pattern was steadily distributed in the third-order and fourth-order attractor moment planes, while transitional flow pattern changed irregularly sharply in the third-order attractor moment plane, but changed linearly in the fourth-order attractor moment plane. The study showed that the chaotic attractor morphological of oil-water two-phase flow was sensitive to flow pattern transition, and it was helpful to understanding the nonlinear dynamic mechanism of oil-water flow pattern transition.