水平与竖直布置方式下静态混合器内瞬态压力波动混沌特征  

Chaotic characteristics of instantaneous pressure fluctuations in vertical and horizontal Kenics static mixers

作　　者：孟辉波[1] 禹言芳[1] 王丰[1] 吴剑华[1] 

机构地区：[1]沈阳化工大学辽宁省高效化工混合技术重点实验室,辽宁沈阳110142

出　　处：《北京化工大学学报（自然科学版）》2013年第6期93-99,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金(21106086/21306115);辽宁省高等学校优秀人才计划资助项目(LJQ2012035);辽宁省博士科研启动基金(20131090);辽宁省教育厅科研项目计划(L2013164)

摘　　要：为了获得不同布置方式下SK型静态混合器内流体瞬态流动的非线性特征,在湍流状态下（Re=1756～3512）采用高速数据采集器Dewe-3021和压力传感器测量了不同雷诺数和截面处瞬态压力波动时间序列（PFS）；利用混沌吸引子周界测度、混沌动力结构突变以及递归率等参数定量表征水平放置与竖直放置时SK型静态混合器内压力波动特征.研究表明：不同布置状态下静态混合器内PFS的混沌吸引子二维面积增长率随轴向位置的变化趋势基本一致,且SA-Ao呈线性分布；与水平放置的SK型静态混合器相比,竖直放置时压力波动混沌特性强,混沌动力结构突变小,吸引子演化稳定；混沌形态特征参数能有效区别SK型静态混合器在不同布置状态下的流体动力学特征.In order to determine the nonlinear characteristics of transient flqW in a Kenics static mixer （ KSM ） in different directions under turbulent conditions, high-speed data acquisition equipment （Dewe-3021） and a pressure transducer were employed to measure the time series of instantaneous pressure fluctuation signals （PFS） for differ- ent Reynolds numbers and different cross sections. The pressure fluctuations in both horizontal and vertical KSMs were characterized quantitatively through chaotic attractor perimeter measurements, dynamic structure changes and recurrence rate measurements. The pressure fluctuation experiment results show that the growth ratios of the chaotic attractors of the two-dimensional areas of KSM in different orientations have the same variation trend with changes in axial position and both SA - Ao plots have linear distributions. The pressure fluctuation in a vertical KSM has stron- ger chaotic characteristics, smaller dynamic structure change and more stable attractor evolution than for a horizon- tal KSM. Chaotic characteristics can distinguish the fluid dynamics properties in KSM placed in different directions and give a theoretical basis for promoting widespread industrial applications of KSM.

关 键 词：静态混合器 压力波动信号 面积增长率 突变 递归率 

分 类 号：TQ051.7[化学工程]