中文摘要：

提出使用文丘里气泡发生器的微鼓泡反应器,以空气-水为模拟介质,高速相机为测量手段,考察操作条件和结构参数对文丘里气泡发生器气泡尺寸分布、气泡Sauter平均直径的影响.研究发现,文丘里气泡发生器的气泡Sauter平均直径随着气量的增大而增大,随着液量的增大而减小;当气孔位置位于喉管处时,气泡Sauter平均直径最小;当喉管液速为0.983~2.949m/s时,气泡Sauter平均直径随气孔数量的增加而减小;当喉管液速为3.932~4.915m/s时,气泡Sauter平均直径随气孔数量的增加先减小后略有增大,当开孔数大于6时,气孔数量对气泡Sauter平均直径的影响较小.通过对多组实验的回归分析,提出气泡Sauter平均直径与液相雷诺数、气相雷诺数的经验关联式,计算值与实际值吻合较好.

英文摘要：

The Venturi bubble generator was applied in the micro bubble column reactor based on the airwater system in order to analyze the influences of operating conditions and structural parameters on the bubble size distribution and bubble Sauter mean diameter by the high speed camera.Results show that the bubble Sauter mean diameter increases under higher gas flow rate whereas it decreases under higher liquid flow rate.The bubble Sauter mean diameter reaches the minimum when air holes are located at the Venturi throat.When liquid velocity at the Venturi throat ranges from 0.983 to 2.949m/s,bubble Sauter mean diameter decreases with the increase in the number of air holes.While liquid velocity at the Venturi throat ranges from 3.932 to 4.915 m/s,bubble Sauter mean diameter decreases at first and then slightly increases.The number of the air hole has little influence on bubble Sauter mean diameter when it is more than 6.An empirical correlation of bubble Sauter mean diameter based on ReL and ReG was proposed through the regression analysis.The calculated values accorded well with the experimental data.