中文摘要：

现有液膜反转方案都只利用一半的传热面积,本文介绍了一种双面液膜反转方案,用耙型导流器连接上下波纹板束。耙型导流器交叉地将上波纹对板两侧液膜引导到下波纹对板的对面,双面液膜反转后液膜的均匀性对于在下板束的波纹板上的传热传质效率十分关键。作者利用VOF法建立了液膜在耙型导流器单元上的动态气-液两相流CFD模型,并进行了模拟计算。导流器单元中的流场数值模拟结果显示溴化锂溶液液膜流过导流器时在重力和表面张力作用下从导流舌中间和沿圆弧缺口边分成三股流体流下并逐步扩展汇合,在较短时间内实现液膜分布均匀化,表明耙型导流器结构可以胜任双面液膜反转对液膜均匀性的要求。

英文摘要：

The conventional film-inversion configurations use only half area of heat transfer surfaces. The paper introduces a dual side film-inversion scheme, which uses the rake shaped film inducers to connect upper and bottom corrugation plate bundles. The rake shaped film inducers lead the both side liquid fihn from the upper corrugation plate couples to the opposite sides of the bottom corrugation plate couples, and the uniformity of the liquid film after inversion is crucial to the efficiency of heat and mass transfer on the surfaces of bottom corrugation plates. The dynamic gas-liquid phase flow CFD Model was established with volume of fluid （VOF） method. The results of numerical simulation on the flow field show that the aqueous LiBr solution film is divided into three parts after passing through each inducer tongue, that along the center of the tongue and along the edges of adjoin long circular holes. These three parts of film gradually merge together and make the film distribution uniform at the bottom edge of the inducer when they falling down by gravity as well as by surface tension force. It convinced that the proposed rake shaped film inducers can accomplish the task of dual side film inversion with required film distribution uniformity.