搅拌混合机理与设计研究  

Study on mechanism and design of stirring mixing

作　　者：谭凤训[1] 高吉云[2] 武道吉[1] 

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101 [2]山东建筑大学学报编辑部,山东济南250101

出　　处：《山东建筑大学学报》2007年第3期214-217,共4页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金(59825106);山东省中青年科学家基金(2004BS08012)

摘　　要：根据流体动力学理论和试验分析,研究湍流条件下的搅拌混合动力学问题。混合是在强制对流作用下经过主体对流、湍流扩散和分子扩散,最终达到分子级均匀混合。湍流条件下,湍流扩散主导宏观混合,分子扩散主导微观混合,而混合时间由宏观混合主导,G和knT可作为搅拌混合效果的综合设计参数,并通过试验分析进一步证实了该参数的可行性。Based on hydrodynamics theory and experimental analysis, the kinetic mechanism of stilting mixing under eddy conditions is investigated. Under strong compulsive convection flow, turbulent mixing, through convective diffusion, eddy diffusion and molecular diffusion, achieves molecular-scale uniformity. The speed of macroscopic mixing is controlled by eddy diffusion, while the speed of microscopic mixing is controlled by molecular diffusion. The mixing time is dominated by macroscopic mixing. The G and knT can be used as design parameters that determines stirring mixing efficiency. The practicality is further proved by the analysis of the experiment.

关 键 词：搅拌 设计 混合机理 

分 类 号：TU991.22[建筑科学—市政工程]