结构化填充床内流动和传热特性的数值研究  

Numerical study of flow and heat transfer characteristics in structured packed bed

作　　者：贺志龙 李楠[1] 梁国庆 李炳辉 HE Zhilong;LI Nan;LIANG Guoqing;LI Binghui(School of Energy and Power Engineering,Shenyang Institute of Engineering,Shenyang 110136,China)

机构地区：[1]沈阳工程学院能源与动力工程学院,辽宁沈阳110136

出　　处：《热科学与技术》2024年第6期612-619,共8页Journal of Thermal Science and Technology

基　　金：辽宁省教育厅科学研究资助项目(LJKMZ20221713);辽宁省科技厅资助项目(NO.2023-MSLH-234);辽宁省大学生创新创业训练计划资助项目(D202404161608406523)

摘　　要：利用孔隙尺度方法对气体在有序排列多孔介质小球填充床内的流动和传热特性进行数值研究。采用离散坐标辐射(discrete ordinates)模型描述相邻小球的辐射换热,分析小球直径和空气流速度变化对填充床内流动、传热特性的影响。数值模拟与文献结果吻合较好。结果表明:小球直径从2.80~5.60 mm时,气相和固相的平均温差逐渐增加,温度波动加剧;温度分布、小球直径和排列方式对填充床内平均流速产生影响;当入口流速从0.23~0.63 m/s时,锋面温度和辐射热流量降低。Numerical simulations of pore-level was used to numerically appreciate the influence of diameter and air velocity on flow and heat transfer of orderly arrangement porous medium sphere arranged in a 3Dpacked bed,which is under the conditions of using the discrete ordinates model to describe the radiative heat transfer between adjacent spheres.The simulation values qualitatively agree with the data of the literature.The results show that the average temperature difference between the gas phase and the solid phase increases gradually,and the temperature fluctuation intensifies when the particle diameter is from 2.80-5.60 mm.Temperature distribution,sphere diameter and arrangement have an effect on the average velocity in the packed bed.When the inlet velocity is from 0.23-0.63m/s,frontal surface temperature and frontal surface radiation heat flux decrease.

关 键 词：数值研究 辐射 换热 多孔介质 

分 类 号：TK124[动力工程及工程热物理—工程热物理]