length-to-diameter ratio

When the product purity is above 90%, the product recovery is about 19%. The product purity increases with the length-to-diameter ratio of column increasing and the proper value of the ratio is between 3.7 and 4.0.

随着产品气流量的增加，产品气纯度下降，而回收率升高，在所要求的纯度下，回收率能达到19%；在微型化条件下，合适吸附塔的高径比为3.7～4.0之间。

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Simplified analysis on a single fiber fin in the duct flow demonstrates that the heat transfer can be enhanced with the increasing length-to-diameter ratio and thermal conductivity ratio.

对单根纤毛肋进行的简化理论分析表明纤毛长径比和肋材与流体的导热系数比越大其强化换热作用越好。

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