摘要
研究高温固定床壁面或埋设平板表面附近受迫对流换热；计算结果表明当对流－辐射参数或传导－辐射参数减小，或雷诺数增加时辐射换热速率随之增加；辐射对导热、对流的影响由颗粒所吸收的净辐射能的符号所决定；床和平板的辐射特性及热流方向对传热也有影响。
The forced convective heat transfer near a wall or a plate immersed in a packed bed athigh temperatures is investigated. The non-Darcian effects are assumed for the hydrodynam-ics and the coherent scattering theory is used to take account of the radiation heat transfer.Ithas been bund from numerical calculation that the rate of radiative heat transfer increases asthe convection-radiation parameter(Bo) or conduction-radiation parameter(N)decreasesand the Revnoms number increases,The effect of radiation on conduction-convection is de-termined by the sign of the net radiation absorbed by the particles. The radiation propertiesof the plates and the bed medium as well as the direction of heat flux exert a marked influ-ence on the heat transfer in packed beds at high temperatures.
出处
《华中理工大学学报》
CSCD
北大核心
1994年第3期62-68,共7页
Journal of Huazhong University of Science and Technology
关键词
固定床
传热
辐射
复合传热
导热
packed beds
heat transfer
high temperature
radiation
