The effect of multi-orifice plate configuration on bubble detachment volume

doi:10.1016/j.cjche.2018.09.024

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (1): 72-84.DOI: 10.1016/j.cjche.2018.09.024

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

The effect of multi-orifice plate configuration on bubble detachment volume

Jiming Wen, Qiunan Sun, Zhongning Sun, Haifeng Gu

Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China

收稿日期:2018-06-03 修回日期:2018-09-05 出版日期:2019-01-28 发布日期:2019-01-31
通讯作者: Haifeng Gu
基金资助:
Supported by the Fundamental Research Funds for the Central Universities (HEUCFM181203).

The effect of multi-orifice plate configuration on bubble detachment volume

Jiming Wen, Qiunan Sun, Zhongning Sun, Haifeng Gu

Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China

Received:2018-06-03 Revised:2018-09-05 Online:2019-01-28 Published:2019-01-31
Contact: Haifeng Gu
Supported by:
Supported by the Fundamental Research Funds for the Central Universities (HEUCFM181203).

摘要/Abstract

摘要： The multi-orifice plate gas sparger, mainly composed of a multi-orifice plate and a gas chamber, is one of the most common sparger facilities. The aeration performance of multi-orifice plate has a close relation with the multiorifice plate configuration. In addition, the weeping phenomenon has a considerable influence on the gas chamber condition which affects the bubble detachment volume directly. This paper conducts a set of visual experiments to study the influence of multi-orifice configuration and gas chamber condition on the aeration performance of gas sparger. For multi-orifice plate, an improved theoretical model is proposed which considers the wave effect of the previous bubbles generated from adjacent orifices and the variance of the number of active bubbling orifice. A parameter is proposed to evaluate the aeration performance in order to overcome the difficulty caused by the randomness of bubble formation process. The experimental results suggest that the gas chamber filled with water is in favor of large bubble formation. The influence of the pitch of orifice on aeration performance can only be observed in high-restricted case. According to the theoretical model and experimental results, the influences of gas flow rate and the number of open orifices on the aeration performance are analyzed and a design criterion for the number of open orifice is proposed.

关键词: Multi-orifice plate, Aeration performance, Bubble detachment volume, The number of open orifices

Abstract: The multi-orifice plate gas sparger, mainly composed of a multi-orifice plate and a gas chamber, is one of the most common sparger facilities. The aeration performance of multi-orifice plate has a close relation with the multiorifice plate configuration. In addition, the weeping phenomenon has a considerable influence on the gas chamber condition which affects the bubble detachment volume directly. This paper conducts a set of visual experiments to study the influence of multi-orifice configuration and gas chamber condition on the aeration performance of gas sparger. For multi-orifice plate, an improved theoretical model is proposed which considers the wave effect of the previous bubbles generated from adjacent orifices and the variance of the number of active bubbling orifice. A parameter is proposed to evaluate the aeration performance in order to overcome the difficulty caused by the randomness of bubble formation process. The experimental results suggest that the gas chamber filled with water is in favor of large bubble formation. The influence of the pitch of orifice on aeration performance can only be observed in high-restricted case. According to the theoretical model and experimental results, the influences of gas flow rate and the number of open orifices on the aeration performance are analyzed and a design criterion for the number of open orifice is proposed.

Key words: Multi-orifice plate, Aeration performance, Bubble detachment volume, The number of open orifices

Jiming Wen, Qiunan Sun, Zhongning Sun, Haifeng Gu. The effect of multi-orifice plate configuration on bubble detachment volume[J]. Chinese Journal of Chemical Engineering, 2019, 27(1): 72-84.

Jiming Wen, Qiunan Sun, Zhongning Sun, Haifeng Gu. The effect of multi-orifice plate configuration on bubble detachment volume[J]. Chin.J.Chem.Eng., 2019, 27(1): 72-84.

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The effect of multi-orifice plate configuration on bubble detachment volume

The effect of multi-orifice plate configuration on bubble detachment volume

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