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通过实验，在温差从10℃到90℃，夹层间距从0．01m至0．08m，空气层与水平面夹角在0°～90°变化范围内，全面分析了夹层温差、夹角、Re数、间距、纵深比等因素对换热的影响．拟合出了各角度下的准则方程式，并在θ＞60°时，用（1－θ／18O）n来体现角度变化对换热的影响，避免出现90°时准则式与其它角度下形式无法统一的问题．分析了一定温差、角度下对流换热量随间距的变化关系，给出了最佳间距，从而为工程计算提供了理论依据．
Through experiments, the temperature difference from 10 ℃ to 90 ℃, the interlayer spacing from 0.01m to 0.08m, the angle between the air layer and the horizontal plane in the range of 0 ° ~ 90 °, a comprehensive analysis of the sandwich temperature, angle, Re , Spacing, depth ratio and other factors on heat transfer. The criterion equations for each angle are fitted out and the influence of angle change on heat transfer is expressed as (1-θ / 18O) n at θ> 60 ° to avoid the difference between the standard form at 90 ° and other forms Uniform problem. The relationship between the convective heat transfer and the spacing is analyzed under a certain temperature difference and angle, and the optimal spacing is given, which provides a theoretical basis for engineering calculation.