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首页> 外文期刊>Journal of Heat Transfer >Use of an Inverse Method to Determine Natural Convection Heat Transfer Coefficients in Unsteady State
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Use of an Inverse Method to Determine Natural Convection Heat Transfer Coefficients in Unsteady State

机译：使用逆方法确定不稳定状态下的自然对流传热系数

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摘要

The purpose of this study is to evaluate the efficiency of an inverse method to determine the variation of convective heat transfer coefficients in the unsteady state inside building enclosures. The experimental system is mainly composed of a vertical, heated, flat plate where natural convection heat flow is generated and of a radiative source which can impose a known flux condition. The inverse method calculates the total heat flux by conduction along the vertical flat plate, together with surface temperatures. Subtracting the local contribution of the radiative heat flux from the total heat flux gives the average convective heat flux at different heights of the plate. For various boundary conditions, it is then possible to determine the values of the convective heat exchange coefficients. Uncertainty calculations relative to these results confirm the reliability of the inverse method developed.
机译：这项研究的目的是评估一种确定建筑物外壳内部非稳态状态下对流传热系数变化的反方法的效率。实验系统主要由产生自然对流热流的垂直加热平板和辐射源组成，辐射源可施加已知的通量条件。逆方法通过沿着垂直平板的传导计算总的热通量以及表面温度。从总热通量中减去辐射热通量的局部贡献，可得出板不同高度处的平均对流热通量。对于各种边界条件，然后可以确定对流热交换系数的值。相对于这些结果的不确定性计算证实了所开发的反演方法的可靠性。

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