水平管中气固两相流的混沌特征分析  

Chaotic Characteristics of Gas-solid Flow in Horizontal Pipe

作　　者：赵艳艳[1] 李留仁[2] 刘海峰 于遵宏[3] 

机构地区：[1]石油大学石油天然气工程学院,北京102249 [2]西安电子科技大学,西安710071 [3]华东理工大学洁净煤技术研究所,上海200237

出　　处：《华东理工大学学报（自然科学版）》2004年第5期510-513,共4页Journal of East China University of Science and Technology

基　　金：国家重点基础研究发展规划项目(G1999022103)

摘　　要：对水平管密相气力输送系统的混沌动力学行为进行了分析,对煤粉浓度信号时间序列的最大Lyapunov指数和关联维数进行了计算。结果表明,系统的最大Lyapunov指数均大于零,这充分说明煤粉在水平管中的密相气力输送存在混沌特征。从密相移动床流区到沉积层流区,混沌吸引子由大变小,关联维数从1.5359减小到1.0764。说明从密相移动床流区到沉积层流区,流体系统运动的混沌程度逐渐减弱。Chaos dynamic behavior of dense phase pneumatic convey system is analyzed in the paper. The maximum Lyapunov exponent and correlation dimension of time series of concentration signals of pulverous coal are calculated. The results show that the maximum Lyapunov exponent of the system is greater than zero. This indicates the system is chaos. From dense moving flow to settling flow, chaotic attractor gradually diminishes, correlation dimension decreases from 1.535 9 to 1.076 4. It shows that from dense moving flow to settling flow, the system chaotic degree gradually weakens.

关 键 词：气固两相流 最大LYAPUNOV指数 关联维数 混沌吸引子 流型 

分 类 号：TQ022.4[化学工程]