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首页> 外文期刊>Journal of industrial and engineering chemistry >Effect of particle size and concentration on bubble size distribution and aspect ratio in a counter-current microstructured bubble column
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Effect of particle size and concentration on bubble size distribution and aspect ratio in a counter-current microstructured bubble column

机译：粒度和浓度对逆流微结构气泡塔的气泡尺寸分布和纵横比的影响

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摘要

The experimental study of bubble size and its distribution and bubble aspect ratio in a dense bubbly flow conditions remains challenging. The present work enunciates the bubble size and its distribution, and bubble aspect ratio in two (air-water) and three-phase (air-water-coal particle) in a counter-current microstructured bubble column with and without surfactant. The effects of dispersed and continuous phase velocity, solid loading, and solid size are investigated. The results show that an increase in the dispersed phase velocity, the particle concentration led to a rise in Sauter mean bubble diameter, while, it is decreased with an increase in the continuous phase velocity and particle size. The aspect ratio of the bubble decreases as the Eotovos number increases. Bubble size distributions follow the log-logistic cumulative distribution function. Bubbles in the present system are plotted in the grace diagram, indicating that the bubbles cover both the spherical and ellipsoidal shape regimes. A generic empirical correlation is proposed for the Sauter mean bubble diameter and distribution function parameters in terms of operating conditions and physical properties of the system. Experimental data and correlations from the literature and this study were compared with the results of the proposed correlation. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：致密气泡流动条件下气泡尺寸及其分布和气泡纵横比的实验研究仍然具有挑战性。本作本作在逆流微结构化气泡塔中的两个（空气水）和三相（空气 - 水 - 煤颗粒）中的气泡尺寸及其分布和泡谱比，其具有和不含表面活性剂。研究了分散和连续相速度，固体载荷和固体尺寸的影响。结果表明，分散的阶段速度的增加，颗粒浓度导致燃烧器平均气泡直径的上升，同时，随着连续相速度和粒度的增加而降低。随着Eotovos数的增加，气泡的纵横比降低。泡沫尺寸分布遵循日志逻辑累积分布函数。本系统中的气泡绘制在优雅图中，表明气泡覆盖球形和椭圆形形状。在制造条件和系统的物理性质方面，提出了一种通用的经验相关性。将文献和本研究的实验数据和相关性与提出的相关结果进行了比较。 （c）2020朝鲜工业与工程化学学会。 elsevier b.v出版。保留所有权利。

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