受限空间内浮升气泡与液体间传质行为实验研究

Investigation on mass transfer behavior between floating bubbles and liquid in confined space

采用紫外诱导荧光(UIF)实验方法,研究Hele-Shaw狭缝受限尺度对受限空间内浮升气泡流体力学与气液传质行为的影响。实验中以二苯并[b,e]吡啶作为荧光剂实现了受限空间内CO_(2)溶液浓度分布及其气泡运动速度的定量测量,获得了CO_(2)在受限空间内运动过程中的传质量和气泡动力学参数,并分别计算气泡受限空间内液膜区和自由接触区的传质速率。分析得到受限空间中不同狭缝宽度内CO_(2)的传质行为,分析了受限尺度对CO_(2)-水体系传质过程的影响。

The ultraviolet-induced fluorescence(UIF)experimental method was used to study the effect of the confined scale of the Hele-Shaw slit on the hydrodynamics and gas-liquid mass transfer behavior of the buoyant bubble in the confined space.In the experiment,dibenzo[b,e]pyridine was used as a fluorescent agent to realize the quantitative measurement of CO_(2)solution concentration distribution and bubble velocity in the confined space.The mass transfer and bubble dynamics parameters of CO_(2)in the confined space were obtained,and the mass transfer rates of liquid film area and free contact area in the confined space were calculated respectively.The mass transfer behavior of CO_(2)in different slit widths in confined space was analyzed,and the influence of confined scale on the mass transfer process of CO_(2)water system was analyzed as well.