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Influence of radiation energy transfer on boundary layer temperature drops

机译:辐射能传递对边界层温度下降的影响

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摘要

The influence of thermal radiation on wall surface temperatures in a typical stationary conjugate heat transfer problem is studied. Free convective heat transfer, accounted for phenomenologically through the introduction of heat transfer coefficients, is supplemented by surface thermal radiation. The calculations clearly indicate that surface radiation can change significantly the surface temperatures which are, in general, reduced with increasing emissivities of the walls. In particular, in the case of small convection heat transfer coefficients, small thermal transmittances of the walls and high values of emissivities, the temperature difference across the temperature boundary layers adjacent to the walls could even be reversed.
机译:研究了典型固定共轭传热问题中热辐射对壁表面温度的影响。从表面上讲,通过引入传热系数在现象学上解释了自由对流传热,并通过表面热辐射进行了补充。计算清楚地表明,表面辐射可以显着改变表面温度,通常随着壁的发射率的增加而降低。特别地,在对流传热系数小,壁的热透射率小和发射率的值高的情况下,甚至可以反转与壁相邻的温度边界层的温度差。

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