Bubble size distribution and bubble ellipticity were measured as a function of axial position in a vertically oriented semi‐batch gas–liquid Taylor vortex reactor with varying gas flow rate and inner cylinder rotation speed producing axial Reynolds numbers in the range 23.8–119 and azimuthal Reynolds numbers up to 4.2 × 10⁴. The mean bubble size increases monotonically with axial distance from the bottom of the reactor at the location of gas injection. The functional form of the growth of the mean bubble size with axial position depends upon the azimuthal Reynolds number. Specifically, when the azimuthal Reynolds number is less than 1.3 × 10⁴, the mean bubble size increases linearly with axial distance from the bubble injection point. In contrast, for azimuthal Reynolds numbers greater than this critical value, the mean bubble size increases with axial distance in a sigmoidal manner.

中文翻译：

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半间歇垂直气液泰勒涡流中气泡尺寸分布，数量密度和形状的演变

在垂直方向的半批气液泰勒涡旋反应器中，随着气体流速和内筒转速的变化，气泡尺寸分布和气泡椭圆率随轴向位置的变化而变化，产生轴向雷诺数在23.8–119范围内，方位角雷诺数数字最大为4.2×10 ⁴。平均气泡尺寸随着在气体注入位置处距反应器底部的轴向距离而单调增加。平均气泡大小随轴向位置的增长的函数形式取决于方位雷诺数。具体而言，当方位雷诺数小于1.3×10 ^4时，平均气泡尺寸随距气泡注入点的轴向距离线性增加。相反，对于大于该临界值的方位雷诺数，平均气泡大小随S形的轴向距离而增加。