新型饲料粉碎机数值模拟,其粉碎室的MRF和动网格UDF计算比较  

Numerical simulation model of feed mill, the comparison of MRF and dynamic grid UDF of crushing chamber

作　　者：曹媛[1,2] 汪建新[2] 曹丽英[2] 

机构地区：[1]包头轻工职业技术学校,内蒙古包头014010 [2]内蒙古科技大学机械工程学院,内蒙古包头014010

出　　处：《饲料工业》2015年第13期5-9,共5页Feed Industry

基　　金：国家自然基金青年科学基金资助项目[51105189];内蒙古自然科学基金[2014MS0534]

摘　　要：新型饲料粉碎机改变传统锤片粉碎机的物料环流层,利用单机循环粉碎的方法解决传统粉碎机能耗大、物料粉碎率、物料温升大和锤片末端磨损的问题。其粉碎室内部流场直接影响饲料的分离效率以及物料的输送效率,采用计算流体力学的方法(CFD)模拟其内部流场,对于优化粉碎室内部结构体购粉碎率以及减少负压有重要作用。通过MRF和动网格UDF两种方法,对转笼内部流场进行计算比较,分析表明MRF在模型处理复杂运动边界模拟和计算结果连续性方面不及动网格UDF模型,MRF在计算耗费方面优于动网格模型。The new feed mill to change traditional material circulation layer of hammer mill, the use of single-circuit grinding mill of traditional methods to solve large energy consumption, material crushing rate, the material temperature rise is big and the hammer end wear problems. The crushing chamber internal flow field directly affects feed separation efficiency, material conveying efficiency, by using the method of computational fluid dynamics （CFD） simulation of the internal flow field, for the optimization of the grinding chamber internal structure purchase crushing rate and have an important role to reduce the negative pressure. Through the MRF and dynamic grid UDF, comparison of the calculation of internal flow field of the rotor cage, analysis showed that the MRF in the model boundary processing complex motion simulation and calculation results of continuity than the dynamic mesh model of UDF, MRF superior in terms of cost calculation in dynamic mesh model.

关 键 词：新型饲料粉碎机 UDF动网格 MRF 数值模拟 

分 类 号：S817.122[农业科学—畜牧学]