Chaotic Characteristic Analysis of Oil-air-water Three-phase Flow in Vertical Upward Pipe Based on Image Gray Signals
ZHOU Yun-long, LI Hong-wei, HE Qiang-yong ((Northeast Dianli University, Jilin 132012, Jilin Province, China))
Shooting the dynamic image of the oil-gas-water three-phase flow six typical flow type with the application of high-speed camera was in the vertical upward pipe where was 35# lubricants, air and water as the test medium. Extracting the mean gray of every frame image was to compose time series. Analyzed the chaos of the time series. Methods for the delay time, mainly with the mutual information, the self-relevant law, the average displacement and the C-C algorithm were compared, as well as power spectrum ,chaos associated HURST index were employed. The oil-gas-water three-phase flow type forming mechanism was analyzed. The test results show that the chaos characteristic of the dynamic image gray fluctuating signals of the oil-gas-water three-phase flow in vertical upward pipe can characterize the three-phase typical flow type clearly.