摘要
本文对填充床内顺序排列,六层堆积的直径为28mm的八分之一小球的流动特性进行数值研究,定量分析孔隙内的流动特性,并详细研究了颗粒Re数的变化对多孔介质内层流流场的影响。结果表明,当颗粒Re为12.17和28.88时,流线贴着小球壁面流动;当颗粒Re为105.57和204.74时,由于惯性力的影响占了主导作用,流线不再贴着小球壁面流动,同时,当颗粒Re为204.74时,在孔隙内部产生了明显的回流现象。
In this paper,the flow characteristics in structured pellet packed bed was numerically studied in order to quantitatively analyze the flow characteristics in the pore and the effects of the laminar flow in porous media with different particle Re numbers. Results show that when the particle Re is 12. 17 and 28. 88,the streamline is located on the pellets surface. With the particle Re of 105. 57 and 204. 74,streamline is no longer on the pellets surface because of the influence of the inertia force. Additionally,there is an obvious backflow in the pore for the case with particle Re of 204. 74.
出处
《热能动力工程》
CAS
CSCD
北大核心
2016年第10期79-83,127-128,共5页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金(50476105
51406123)
沈阳工程学院校内科技基金项目(LGQN-1503)
关键词
多孔介质
数值模拟
流场
填充床
porous media
numerical simulation
flow field
packed bed
