化工学报2017，Vol.68Issue(2)：637-642,6.DOI:10.11949/j.issn.0438-1157.20160750
穿流式刚-柔组合搅拌桨强化混合澄清槽内油-水两相混沌混合
Oil-water biphase chaotic mixing enhanced by punched rigid-flexible combination impeller in mixer-settler
摘要
Abstract
Signal of punched rigid-flexible combination impeller disturbance of oil-water biphase pressure fluctuation in the mixer-settler were collected and processed by LabView, plus Matlab software. The largest Lyapunov exponent (LLE) and multiscale entropy (MSE) reflected the degree of the chaos in the fluid field. At the same time, the fluid field’s visualization technology was adopted to observe fluid mixing performance. It indicated that compared with the rigid combination impeller, with utilizing punched rigid-flexible combination impeller, the fluid field’s structure, coupled with the way of energy dissipation was controlled by the synergetic effect of punch hole and flexible impeller. Furthermore, the chaos of fluid and mixing performance were superior to the rigid combination impeller. At rotation speed 88 r·min−1, the chaotic mixing of fluids was at the optimal state, and the LLE was over zero, testifying the fluid mixing system in chaotic state. Punched rigid-flexible combination impeller system of MSE was significantly higher than that of the rigid combination impeller, indicating mixing performance of punched rigid-flexible combination impeller superior to the rigid combination impeller system. The number of punched holes on the flexible and the thickness of flexible blade had obvious influence on the chaotic mixing performance.关键词
混合澄清槽/刚-柔组合/Lyapunov指数/多尺度熵/穿流搅拌桨/混沌Key words
mixer-settler/rigid-flexible combination/Lyapunov exponent/multiscale entropy/punched impeller/chaos分类
化学化工引用本文复制引用
刘作华,许传林,何木川,谷德银,许恢琴,何海先,陶长元,王运东..穿流式刚-柔组合搅拌桨强化混合澄清槽内油-水两相混沌混合[J].化工学报,2017,68(2):637-642,6.基金项目
国家自然科学基金项目（21576033）；清华大学化学工程联合国家重点实验室开放课题项目（SKL-ChE-15A02）。 （）
