蜂窝陶瓷蓄热体中的辐射传热  

Thermal Radiation Heat Transfer in Honeycomb Ceramics

作　　者：和蒙蒙[1] 刘瑞祥[1] 刘永启[1] 高振强[1] 郑斌[1] 

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《陶瓷学报》2012年第3期284-288,共5页Journal of Ceramics

基　　金：国家高技术研究发展计划(863)资助项目(编号:2009AA063202);山东省自然科学基金资助项目(编号:ZR2009FQ023)

摘　　要：蜂窝陶瓷是由贯穿本体非常密集的小孔构成,当载热气体沿孔隙通过蜂窝体时,则其中每一单孔可看作非等温空腔。在前期模型的基础上,以圆形孔道的辐射蜂窝体为研究对象,建立了考虑辐射、对流与热传导复合传热时的能量控制方程。使用FlexPDE软件数值计算出蓄热陶瓷氧化床的温度分布以及辐射对氧化床温度的影响。结果表明,氧化床轴向温度呈梯形分布;辐射具有平滑氧化床温度梯度的作用。所得模拟结果与实验结果较为吻合。Honeycomb ceramics consists of many penetrating holes. When hot gas directly flows through the honeycomb ceramics, each single cavity becomes non-isothermal one. On the basis of the preliminary model, radiant porous body with circular apertures is taken as a study object. Heat-transfer mathematical model regarding radiation, convection and conduction is set up. The temperature distribution in thermal reverse flow reactor and the effect of radiation on temperature of reactor are analyzed by numerical calculation using FlexPDE. The results show that： the temperature distribution in reverse flow reactor has a typical trapezoidal shape, and thermal radiation can be beneficial in smoothing temperature gradients. The calculation results show a good agreement with experimental results.

关 键 词：矿井乏风 热逆流氧化装置 蜂窝陶瓷 复合换热 辐射 数学模型 FlexPDE 

分 类 号：TQ174.75[化学工程—陶瓷工业]