Analysis of flow patterns in bubble and slurry bubble columns based on local heat transfer measurements
Analysis of flow patterns in bubble and slurry bubble columns based on local heat transfer measurements
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DOI：
10.1016/s1385-8947(01)00186-3
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发表时间：
2002-04
影响因子：
15.1
通讯作者：
Hanning Li;A. Prakash
中科院分区：
文献类型：
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作者：
Hanning Li;A. Prakash
基于局部时均传热系数，对两相（G-L）和三相（G-L-S）鼓泡塔内的流型进行了研究。实验在直径0.28米的有机玻璃柱中进行，在空气-水和空气-水-玻璃珠（35μm）体系中，表观气速范围为0.05-0.3m/s，浆液浓度范围为0- 40 vol.%。传热测量是用一个专门设计的探针，提供局部传热系数。通过对实测传热数据的分析，说明了气速和浆液浓度对塔内不同区域流型的影响。在不同的轴向和径向位置，并为不同的探头方向的传热测量提供了进一步的见解，在塔中的液体循环模式。
Flow patterns in two-phase (G–L) and three-phase (G–L–S) bubble columns are investigated based on local time-averaged heat transfer coefficients. The experiments are conducted in a 0.28m diameter Plexiglas column in air–water and air–water–glass beads (35μm) systems over superficial gas velocity range 0.05–0.3m/s and slurry concentration range 0–40vol.%. The heat transfer measurements are made with a specially designed probe which provided local heat transfer coefficients. The measured heat transfer data are analyzed to illustrate the effects of gas velocities and slurry concentrations on flow patterns in different regions of the column. The heat transfer measurements at different axial and radial positions and for different probe orientations provided further insights into liquid circulation patterns in the column.