Numerical Investigation on Pressure Fluctuations for Different Configurations of Vaned Diffuser Pumps

Feng, Jianjun; Benra, Friedrich-Karl; Dohmen, Hans Josef

doi:https://doi.org/10.1155/2007/34752

International Journal of Rotating Machinery

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Research Article | Open Access

Volume 2007 | Article ID 034752 | https://doi.org/10.1155/2007/34752

Numerical Investigation on Pressure Fluctuations for Different Configurations of Vaned Diffuser Pumps

Jianjun Feng,¹Friedrich-Karl Benra,¹and Hans Josef Dohmen¹

Academic Editor: Shimpei Mizuki

Received03 Jun 2006

Revised08 Dec 2006

Accepted16 Jan 2007

Published06 Feb 2007

Abstract

Numerical simulations on impeller-diffuser interactions in radial diffuser pumps are conducted to investigate the unsteady flow, and more attention is paid to pressure fluctuations on the blade and vane surfaces. Calculations are performed at different operating points, different blade number configurations, and different radial gaps between the impeller and diffuser to examine their effects on the unsteady flow. Computational results show that a jet-wake flow structure is observed at the impeller outlet. The biggest pressure fluctuation on the blade is found to occur at the impeller trailing edge, on the pressure side near the impeller trailing edge, and at the diffuser vane leading edge, independent of the flow rate, radial gap, and blade number configuration. All of the flow rate, blade number configuration, and radial gap influence significantly the pressure fluctuation and associated unsteady effects in the diffuser pumps.

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Copyright

Copyright © 2007 Jianjun Feng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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