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2014 | 35 | 1 | 47-53

Article title

Pumping Capacity of Pitched Blade Multi-Stage Impellers

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Content

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Languages of publication

EN

Abstracts

EN
This paper extends knowledge about flow in an agitated batch with pitched blade multi-stage impellers. Effects of various geometrical parameters (blade number, distance between impellers) of pitched blade multi-stage impellers on pumping ability have been investigated. Axial velocity profiles were measured by LDA (Laser Doppler Anemometry). Axial pumping capacities were obtained by integration of measured axial velocity profiles in outflow from impellers. Main attention was focused on the effect of the distance between impellers in multi-stage configurations, on their pumping capacity and flow in the mixing bath in comparison with an independently operating pitched blade impeller with the same geometry. In case of a relatively close distance between impellers H3/d = 0.5 - 0.75, the multi-stage impeller creates only one circulation loop and the impellers itself behave identically as pumps in series. However for relative higher distance of impellers than H3/d = 1.25, the multi-stage impeller creates two separated circulation loops.

Publisher

Year

Volume

35

Issue

1

Pages

47-53

Physical description

Dates

published
1 - 3 - 2014
received
18 - 2 - 2013
online
25 - 4 - 2014
accepted
5 - 12 - 2013

Contributors

  • Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Process Engineering, Technicka 4, 166 07 Prague 6, Czech Republic

References

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  • Wu J., Zhu Y., Pullum L., 2001. The effect of impeller pumping and fluid rheology on solid suspension in a stirred vessel. Can. J. Chem. Eng., 79, 177-186. DOI: 10.1002/cjce.5450790201.[Crossref]
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  • Xia J-Y., Wang Y-H., Zhang S-L., Chen N., Yin P., Zhuang Y-P., Chu J., 2009. Fluid dynamics investigation of variant impeller combinations by simulation and fermentation experiment. Biochem. Eng. J., 43, 252-260. DOI: 10.1016/j.bej.2008.10.010. [WoS][Crossref]

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_cpe-2014-0004
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