复合换热情况下肋片性能的研究

STUDIES ON THERMAL PERFOKMANCE OF FIN ARRAY WITH COUPLED RADIATION AND CONVECTION

本文对一般梯形肋在复合换热中的特性给予一综合评估，详细讨论了肋间距与肋高的相互关系对单位面积上的肋片散热量，辐射散热量的影响，定量给出了肋片总散热量与辐射散热量在不同黑度情况下随Ｗ／Ｈ的变化规律。

A synthetical evaluation on the general trapezoidal profile longitudinal fins which delincatestheir thermal performances in the radiative─convective heat transfer is presented A detailedstudy on the total heat transferred and the radiation heat transferred for different emissivitieswith the change of the ratio of the fin spacing to the height W/H is carried out.The numericai so-lution for the dimensionless heat transfer from the fin array is presented and the percentages ofthe radiative and the convective components are clearly given out。