液固及气液固三相并流系统的动力学行为和混沌产生的研究  

Hydrodynamics and chaotic mechanism in liquid-solid two-phase and gas-liquid-solid three-phase cocurrent flow system

作　　者：李晓祥[1] 石炎福[1] 顾丽莉[1] 余华瑞[1] 

机构地区：[1]四川大学化工系,四川成都610065

出　　处：《化学工程》2004年第5期19-24,共6页Chemical Engineering(China)

摘　　要：运用时域、频域、吸引子及混沌特征参数相关维和Kolmogrov熵研究了液固并流系统动力学行为,揭示了液固并流系统是由拟周期过渡到混沌的。在拟周期行为的液固并流系统中引入气体,结果表明:低气速下,床层中只有冠状气泡,它表现为拟周期行为。随着气速的增大,床层中小气泡的出现及浆料湍动的作用使拟周期冠状气泡过渡为混沌,进而整个系统通向了混沌。The hydrodynamic behavior and chaotic mechanism in the liquid-solid two-phase cocurrent flow system was studied using the chaotic analysis technique. It was found that the stage of quasiperiodicity could be clearly (identified) in the conditions of slow slurry flow rate and low particle mass fraction. But it would lead to chaotic (behavior) by increasing the slurry flow rate or particle concentration. Then importing gas to the liquid-solid two-phase cocurrent flow system in the stage of quasiperiodicity. The result shows if gas flow rate is slow, there are only coronary bubbles in the column, and the coronary bubbles behave as quasiperiodic. When increasing the gas flow rate, the small bubbles and slurry oscillation will cause the stage of quasiperiodicity of the coronary bubbles to (chaos). Consequently, the system leads to chaos.

关 键 词：液固二相 气液固三相 并流 动力学 混沌 

分 类 号：TQ013.2[化学工程]