立式辊磨磨腔内部三维两相湍流分析  

Research on the 3-D Two-Phase Turbulent Flow Field in the Chamber of Vertical Roller Mill

作　　者：昃向博[1] 孙椰望[1] 王潍[1] 周以齐[2] 

机构地区：[1]济南大学机械工程学院,山东济南250022 [2]山东大学机械工程学院,山东济南250014

出　　处：《济南大学学报（自然科学版）》2009年第3期279-283,共5页Journal of University of Jinan(Science and Technology)

基　　金：国家“十一五”科技支撑计划(2006BAK11B01);山东省重点学科基金(XTD0713)

摘　　要：采用SolidWorks建立HRM4800立式辊磨三维磨腔模型,依据立式辊磨磨腔内部流场的已知工况数据,分析流场湍流状态、计算模拟边界参数。利用计算流体动力学方法对磨腔内部流场进行三维流固耦合分析,分析过程采用Mixture两相流模型和标准k-ε双方程涡粘模型。通过分析热风进给量对磨腔内部流场迹线和速度等的影响情况,掌握了流场的基本运动规律,得出在工况参数范围内,适量增加进风量有利于减小立式辊磨磨腔内部涡流现象,提高磨腔粉体输运能力,促进气固分离效率;热风气流在磨盘与磨腔壁面间形成的低速高压区有利于气固耦合,在高压区出口端产生的高速流有利于粉体输运。A 3 - D chamber model of HRM4800 was established by use of SolidWorks. According to operation data of the chamber, the turbulent characteristic of the flow field and the boundary parameters of simulation were calculated. Computational fluid dynamics （CFD） method is used in the analysis of 3 - D coupling flow field. The two - phase flow mixture model and the standarddouble equation model are used in the process of turbulent flow simulation. Through the analysis of the chamber flow field on the base of different rates of hot gas, it is indicated that in the range of the operation parameters, increasing the quantity of hot gas will reduce the chamber interior turbulent flow phenomenon and enhance the transportation efficiency and separation efficiency of powder. The high pressure flow region between the wall surface of chamber and the side of table will take advantage of gas - solid flow coupling, and the high speed flow at the end of high pressure region will enhance the powder transportation.

关 键 词：立式辊磨 湍流 两相流 混合模型 

分 类 号：TH122[机械工程—机械设计及理论]