Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine

Dai'en Shi; Ziqi Cai; Archie Eaglesham; Zhengming Gao

doi:10.1016/j.cjche.2014.11.028

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Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine

流体力学与传递现象 | Updated：2026-01-06

- Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine
- Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine
- 中国化学工程学报（英文版） 2015年23卷第3期页码：482-489
- Affiliations：
  
  1. School of Chemical Engineering, Beijing University of Chemical Technology,Beijing,China,100029
  2. Huntsman Polyurethane, Everslaan 45, B- Everberg,Brussels,Belgium,3078
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.11.028
  中图分类号：
- 纸质出版：2015
- Accepted：
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Dai'en Shi, Ziqi Cai, Archie Eaglesham, 等. Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine[J]. 中国化学工程学报（英文版）, 2015,23(3):482-489.

Dai'en Shi, Ziqi Cai, Archie Eaglesham, Zhengming Gao. Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine[J]. , 2015, 23(3): 482-489.
Dai'en Shi, Ziqi Cai, Archie Eaglesham, 等. Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine[J]. 中国化学工程学报（英文版）, 2015,23(3):482-489. DOI： 10.1016/j.cjche.2014.11.028.

Dai'en Shi, Ziqi Cai, Archie Eaglesham, Zhengming Gao. Effects of bubbly flow on bending moment acting on the shaft of a gas sparged vessel stirred by a Rushton turbine[J]. , 2015, 23(3): 482-489. DOI： 10.1016/j.cjche.2014.11.028.

摘要

Abstract

The bending moment acting on the overhung shaft of a gas-sparged vessel stirred by a Rushton turbine

as one of the results of fluid and structure interactions in stirred vessels

was measured using a moment sensor equipped with digital telemetry. An analysis of the shaft bending momentamplitude shows that the amplitude distribution of the bending moment

which indicates the elasticity nature of shaftmaterial against bending deformation

follows the Weibull distribution. The trends of amplitude mean

standard deviation and peak deviation characteristics manifest an “S” shape versus gas flow. The “S” trend of the relative mean bending moment over gas flow rate

depending on the flow regime in gas-liquid stirred vessels

resulted from the competition among the nonuniformity of bubbly flow around the impeller

the formation of gas cavities behind the blades

and the gas direct impact on the impellerwhen gas is introduced. A further analysis of the bendingmoment power spectral density shows that the rather low frequency and speed frequency are evident. The low-frequency contribution to bending moment fluctuation peaks in the complete dispersion regime.

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