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| 1 | 烧结镁砂煅烧竖炉内气固传热特性数值分析显示文摘以年产5×10^(4) t烧结镁砂竖炉为研究对象,基于多孔介质理论,建立竖炉内三维稳态气固流动传热模型,并模拟研究竖炉热工参数对床层内气固传热过程的影响.研究结果表明:冷却风流量每增加10%,出口烟气温度降低50℃,出口球团温度降低80℃;冷却段长度每增加5%,出口球团温度降低25℃.以竖炉出口烟气温度和球团温度为优化目标函数,得到竖炉最适宜结构和操作参数,即煅烧风流量为2606.67 m^(3)/h,冷却风流量为2203.34 m^(3)/h,预热煅烧段长度为6.64 m,冷却段长度为11.70 m.在此竖炉运行工况下,出口球团温度为288.75℃,出口烟气温度为414.32℃. | 张晓虎 张晟 赵亮 董辉 | 2022 | 东北大学学报(自然科学版)2022，43，1： | 1 |
| 2 | Numerical Simulation of Heat and Momentum Transport at the Coupled Interface between a Rectangular Channel and Porous Media显示文摘Porous media have been extensively used for the enhancement of heat transfer,due to their large specific surface area.In many cases,the flow and heat transfer in porous media are also coupled with other flow patterns,such as the channel flow.This work investigates numerically a non-isothermal three-dimensional mixing process from a rectangular channel and a porous medium to reveal the influence of the structural parameters on the flow and heat transfer characteristics in the coupled system.The detailed heat and momentum transport behavior at the coupled interface are analyzed at the pore-scale.Correlations of the friction factor and the Nusselt number within the porous media are proposed as functions of the Reynolds number,porosity,velocity ratio,and pore size.Results from the pore-scale simulations are also used to improve the less-cost representative-elementary-volume-scale numerical model,which can be further used for the modeling of relevant engineering problems. | WANG Ye WU Jingyi YANG Guang | 2022 | Journal of Thermal Science2022，31，2： | 0 |
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