HE Mengmeng, LIU Ruixiang, LIU Yongqi, GAO Zhenqiang, ZHENG Bin

(School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255049, China)

Abstract: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.

Key words:VAM; thermal reverse flow reactor; honeycomb ceramics; composite heat transfer; radiation; mathematical model;FlexPDE