摘要
柱塞气－ 液－ 固并流上行系统表现出占据全部管截面的气栓段和气液固混合段间隔出现的流动结构。本文通过标准统计方法（ 功率谱） 和非线性混沌分析方法从定性和定量两方面证明了气栓和气－ 液－ 固混合段运动都是混沌运动。气栓运动的混沌动力学参数（ 相关维和Ｋｏｌｍｏｇｏｒｏｖ 熵） 明显比气－ 液－ 固混合段运动的小，从理论上表明描述气栓运动的动力学比气－ 液－ 固混合段运动的动力学简单，可预测度明显要大。文中还讨论了较精确确定重建伪相空间滞时的方法。
Plugging concurrent upflow gas-liquid-solid system shows a flowing structure that the air plugs( defined as bubbles large enough to span the tube diameter) and the mixing gas-liquid-solid phase appear in turn. This paper proves that the plugging concurrent upflow gas-liquid-solid system is chaos using both standard statistical measure(power spectra) and nonlinear chaotic analysis techniques from qualifying and quantifying. Both correlation dimension and Kolmogorov entropy of the motion of air plugs are much smaller than that of the motion of mixing gas-liquid-solid, which demonstrate that the dynamics of the motion of air plugs is more simply than that of the motion of mixing gas-liquid-solid, and the motion of air plugs is more predictable than the motion of mixing gas-liquid-solid. The more accurate methods to determine the delay time for reconstructing the pseudo-phase space are discussed in this paper also.
关键词
柱塞并流上行
气-液-固流动
化工过程
Gas-liquid-solid three phase, Plugging concurrent upflow, Chaotic behavior
