竖直平板上的水膜流动特征

Performance of the Water Flow Film along a Vertical Plate

液膜表面的吸收或蒸发现象常在空调和各类工艺过程中存在．文中从理论上探讨气液逆流的条件下，气流流动对竖直平板上水膜流动的影响，提出了工程中应用的量纲为１的剪切力（Ｍτ）推荐值范围．

The absorption and evaporation on the surfaces of water films frenquently exist in air conditioning and some industrial processes. In this paper the effect of the air flow to the water film nowing along a vertical plate is analyzed when the air now and wator flow run counter tO each other. The recommended values of M are presented.