本项目提出了一种能够实现液体薄膜双面传质的降膜流动- - 孔网降膜流动，实验发现采用该流动结构能够有效地提高气液传质速率。针对孔网降膜流动过程采用激光多普勒测速仪，激光全息干涉装置，激光纹影仪，高速CCD以及PIV等手段对气液两相流动条件下的孔网降膜流动现象及液膜双面传质时的界面湍动现象进行了定性和定量的实验研究，利用热模传质实验进行了定性和定量的分析研究，利用计算流体力学方法和计算传质学方法进行了理论研究，揭示了孔网结构对降膜流动结构的影响规律，流体流动结构对传质的影响规律以及传质与流动之间得耦合作用规律，在此基础上建立了孔网降膜气液传质设备设计的理论化方法，为新型气液传质与反应设备的开发建立了初步的理论基础。

A novel structured packing was used to generate double vapor-liquid interface falling liquid film(DVLIFL film). Mass transfer experiments have showed that this new kind of falling liquid film can enhance the mass transfer efficiency of vapor-liquid mass transfer process. To investigate the detailed information of the flow and mass transfer behavior of this kind of flow, a theoretical model was proposed. To verify the theoretical results, LDV, PIV, CCD and absorption and distillation experiment was carried out. Experimental setup to record the flow behavior of DVLIFL film was constructed. Computational Fluid Dynamic simulation results showed that the DVLIFL film have a regular turbulent flow structure than that of the ordinary falling liquid film. That is why the DVLIFL film has a enhanced mass transfer efficiency. Based on the work of this project, a novel mass transfer equipment was developed.

本项目提出了一种能够实现液体薄膜双面传质的降膜流动- - 孔网降膜流动，实验发现采用该流动结构能够有效地提高气液传质速率。针对孔网降膜流动过程采用激光多普勒测速仪，激光全息干涉装置，激光纹影仪，高速CCD以及PIV等手段对气液两相流动条件下的孔网降膜流动现象及液膜双面传质时的界面湍动现象进行了定性和定量的实验研究，利用热模传质实验进行了定性和定量的分析研究，利用计算流体力学方法和计算传质学方法进行了理论研究，揭示了孔网结构对降膜流动结构的影响规律，流体流动结构对传质的影响规律以及传质与流动之间得耦合作用规律，在此基础上建立了孔网降膜气液传质设备设计的理论化方法，为新型气液传质与反应设备的开发建立了初步的理论基础。