摘要
蜂窝体是由贯穿本体非常密集的小孔构成,当载热气体迎着小孔流过蜂窝体时,则其中每一单孔变成非等温空腔。考虑开始段影响,分析研究了空腔内辐射、对流热交换。空腔内壁的不同区域之间以及内壁与两端环境之间有辐射热交换。气体与内壁之间的对流给热系数沿长度方向上的分布,设定呈阶梯形。用可分核法求解能量控制方程。所得结果与实测值较为吻合。最终给出了系统参数对内壁及气体温度分布的影响。
Honeycomb ceramics consists of many penetrating holes. When hot gas directly flows through the honeycomb, each single cavity becomes nonisothermal one. Present work analyzes the heat exchange by convection and radiation in the cavity, heat radiation transfer in different areaa of the internal cavity wall and between the wall and environment at each end of the cavity. Heat transfer coefficient for convection is assumed as ladder-type distribution along the flow direction. Energy equation governing the heat exchange is solved by Separable Kernel Method. The calculation results show a good agreement with experimental results. At the same time, it shows that system paramenters have influence on temperature profiles along the cavity.
出处
《钢铁》
CAS
CSCD
北大核心
1991年第12期44-49,共6页
Iron and Steel
