偏心空气射流搅拌器中流体混沌混合的Kolmogorov熵分析

Kolmogorov entropy of fluid chaotic mixing in eccentric air jet-stirred reactors

运用LabVIEW和MATLAB软件,实验研究了偏心空气射流双层桨搅拌反应器内壁的压力脉动信号的Kolmogorov熵值的变化规律。结果表明,Kolmogorov熵受到搅拌转速和空气速率的共同作用：在低转速段（32.5-130.00 r/min）时,Kolmogorov熵值基本不随搅拌转速和空气速率变化;在转速为130.00-260.00 r/min时,随搅拌转速和空气速率的增加,Kolmogorov熵值呈对数函数型增大;在高转速段（260.00-325.00 r/min）时,随搅拌转速和空气速率的增加,Kolmogorov熵值呈指数函数型减小。

With the LabVIEW and MATLAB software, we investigated the variation of Kolmogorov entropy of pressure fluctuation signals on the wall of the eccentric air jet-stirred reactors with double impellers. The results showed that Kolmogorov entropy was affected by both agitation speed and air flow rate. At low agitation speeds （32.5-130 r/min）, the speed and air flow rate had little effect on Kolmogorov entropy; at a range of of 130-260 r/min, Kolmogorov entropy increased logarithmically with the speed and air flow rate; at a range of 260-325 r/min, Kolmogorov entropy decreased exponentially.