基于DDPM+DEM的建筑鼓泡流化床流动特性模拟
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摘要
为对恒压及恒定进口流速条件下鼓泡流化床流场的分布特性及颗粒的运动情况进行研究,采用了密集离散相模型(DDPM)和离散相欧拉碰撞模型(DEM)分析了鼓泡流化床中流体扩散及颗粒的碰撞情况。同时采用实验测试手段对表面颗粒的速度进行检测,实验测试数据与模拟结果进行对比验证。从而对于理解流化床工作机理优化各项参数提供理论依据。
In order to study the distribution characteristics of the flow field in the bubbling fluidized bed and the motion of the particles under constant pressure and constant inlet flow velocity,the dispersion and collision of particles in the bubbling fluidized bed were analyzed by the dense discrete phase model(DDPM)and the discrete phase Euler collision model(DEM). At the same time,the velocity of the surface particles was detected by means of experimental test,and the experimental data were compared with the simulation results. So as to provide theoretical basis for understanding the working mechanism of fluidized bed and optimizing various parameters.
In order to study the distribution characteristics of the flow field in the bubbling fluidized bed and the motion of the particles under constant pressure and constant inlet flow velocity,the dispersion and collision of particles in the bubbling fluidized bed were analyzed by the dense discrete phase model(DDPM)and the discrete phase Euler collision model(DEM). At the same time,the velocity of the surface particles was detected by means of experimental test,and the experimental data were compared with the simulation results. So as to provide theoretical basis for understanding the working mechanism of fluidized bed and optimizing various parameters.
引文
[1]郝振华.粗糙颗粒动理学及流化床气化炉的数值模拟研究[D].哈尔滨:哈尔滨工业大学,2011.
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[3]詹文博.速度进口条件对鼓泡床内气泡行为影响的模拟研究[D].哈尔滨:哈尔滨工业大学,2010.
[4]刘欢鹏,王淑彦,陆慧林,等.DSMC2LES方法研究循环流化床内颗粒团聚物的流动特性[J].化工学报,2005,56(7):1197-1205.
[5]SUN D,WANG S Y,LU H L,et al.A Second-order Moment Method of Dense Gas-solid Flow for Bubbling Fluidization[J].Chemical Engineering Science,2009,64:5013-5027.
[6]欧阳洁,李静海.模拟气固流化系统的数值方法[J].应用基础与工程科学学报,1999,7(4):335-345.
[7]刘阳,刘文铁,何玉荣,等.流化床内非等密度双组份颗粒流动特性的研究[J].热能动力工程,2006,20(6):615-618.
[8]马磊,陈爱平,陆金东,等.流化床-化学气相沉积法制备CNT/Fe-Ni/TiO2及其光催化性能研究[J].无机材料学报,2012,27:33-37.
[9]WANG Y,MASON M T.Two-dimensional Rigid-body Collisions with Friction[J].J.Appl.Mech.,1992,59:635.
[2]王维,李佑楚.颗粒流体两相流模型研究进展.化学进展,2000,12(2):208-217.
[3]詹文博.速度进口条件对鼓泡床内气泡行为影响的模拟研究[D].哈尔滨:哈尔滨工业大学,2010.
[4]刘欢鹏,王淑彦,陆慧林,等.DSMC2LES方法研究循环流化床内颗粒团聚物的流动特性[J].化工学报,2005,56(7):1197-1205.
[5]SUN D,WANG S Y,LU H L,et al.A Second-order Moment Method of Dense Gas-solid Flow for Bubbling Fluidization[J].Chemical Engineering Science,2009,64:5013-5027.
[6]欧阳洁,李静海.模拟气固流化系统的数值方法[J].应用基础与工程科学学报,1999,7(4):335-345.
[7]刘阳,刘文铁,何玉荣,等.流化床内非等密度双组份颗粒流动特性的研究[J].热能动力工程,2006,20(6):615-618.
[8]马磊,陈爱平,陆金东,等.流化床-化学气相沉积法制备CNT/Fe-Ni/TiO2及其光催化性能研究[J].无机材料学报,2012,27:33-37.
[9]WANG Y,MASON M T.Two-dimensional Rigid-body Collisions with Friction[J].J.Appl.Mech.,1992,59:635.