排灌机械工程学报Issue(7)：606-610,5.DOI:10.3969/j.issn.1674-8530.13.1028
潜水搅拌机内部压力脉动特性分析
Analysis of characteristics of pressure fluctuation inside submersible mixer
摘要
Abstract
For a thorough study on the vibration induced by pressure fluctuation inside a submersible mixer,the unsteady,three-dimensional turbulent flow driven by a specific submersible mixer in a se-wage treatment pool is simulated by using software -Fluent 6.3 and Gambit.The RNG k-εturbu-lence model,PISO algorithm,rigid -lid approximation and sliding mesh are adopted in the simula-tion.The pressure fluctuation characteristics in the impeller of submersible mixer are clarified based on an examination of the unsteady flow field features in the impeller and pool.It is shown that the flow of the fluid inside the impeller and in the vicinity of impeller exhibits an obvious periodic feature,i.e. the fluid domain with high pressure and low relative velocity and the domain with low pressure but high relative velocity vary periodically with the rotating impeller.The pressure fluctuation frequency of the fluid in the impeller entrance,outlet and inside the impeller is closely related to impeller rotational fre-quency,and the predominant frequency is 2 times the blade passing frequency.The results may pro-vide a reference for application of the mixers.关键词
潜水搅拌机/压力脉动/水池/数值模拟Key words
submersible mixer/pressure fluctuation/pool/numerical simulation分类
农业科技引用本文复制引用
田飞,施卫东,卢熙宁,张德胜,郎涛..潜水搅拌机内部压力脉动特性分析[J].排灌机械工程学报,2014,(7):606-610,5.基金项目
“十二五”国家科技支撑计划项目（2011BAF14B01）；中国博士后基金面上和特别资助项目（2011M500117）；江苏大学高级专业人才科研启动基金资助项目 （）
