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202106011.pdf
文章编号： 1672-6987（2021）06-0089-07； DOI： 10.16351/j.1672-6987.2021.06.011
李松梅， 吕花明(青岛科技大学 机电工程学院，山东 青岛 266061)
摘要： 为研究安装双层六叶圆盘涡轮式搅拌桨的立式搅拌装置的流场分布特性，建立其旋转坐标系下的流体控制方程，推导出圆柱坐标系下的k-ε湍流模型。通过N-S方程进行数值计算，研究流场速度随高度与径向尺寸的变化情况；采用Fluent对导入的实体模型进行流体力学仿真验证。结果表明：搅拌装置的最大流场速度发生在搅拌桨叶的边缘上，最小流场速度发生在搅拌罐的液面、边缘以及搅拌轴处，搅拌桨之间流场交汇导致场速减小，流场速度以搅拌轴为中心对称分布；针对流场分布情况提出改进方案，提高流场整体分布的均匀性。为搅拌装置流场分布的深入研究和理论探究到实际应用的转变提供理论指导和技术支持。
关键词： 涡轮式搅拌桨； 立式搅拌装置； 流体力学分析； 均匀性
中图分类号： TH 113.2； TH 31文献标志码： A
引用格式： 李松梅， 吕花明. 新型立式双桨搅拌装置的流场分布特性研究［J］. 青岛科技大学学报(自然科学版), 2021, 42(6): 89-95.
LI Songmei, LYU Huaming. Study on flow field distribution characteristics of a new type of vertical double impeller agitator［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2021， 42（6）： 89-95.
Study on Flow Field Distribution Characteristics of A New Type of Vertical Double Impeller Agitator
LI Songmei, LYU Huaming
(College of Electromechanical Engineering, Qingdao University of Science and Technology， Qingdao 266061, China)
Abstract: To study the flow field distribution characteristics of a vertical agitator with double-layer six blade disk turbine impeller, the fluid control equation in rotating coordinate system was established, and the turbulence model in cylindrical coordinate system was derived. Through the numerical calculation of N-S equation, the change of flow velocity with height and radial size is studied; the imported solid model is verified by fluid dynamics simulation with fluent. The results show that the maximum flow field velocity of the mixing device occurs at the edge of the mixing blade, and the minimum flow field velocity occurs at the liquid level, edge and stirring shaft of the mixing tank. The field velocity decreases due to the flow field intersection between the impellers, and the flow field velocity is symmetrically distributed around the mixing shaft. According to the flow field distribution, the improvement scheme is proposed to improve the uniformity of the overall flow field distribution. It provides theoretical guidance and technical support for the in-depth study of flow field distribution and the transformation from theoretical exploration to practical application.
Key words: turbo-agitator; vertical agitator; fluid mechanics analysis; uniformity
收稿日期： 2020-12-05
基金项目： 山东省重点研发科技计划项目(2018JMRH0508)；青岛市科技计划项目(18-2-2-21-jch).
作者简介： 李松梅（1986—），女，副教授.
