Experiments in Fluids

, Volume 39, Issue 2, pp 192–201 | Cite as

Time-resolved particle imaging velocimetry for the investigation of rotating stall in a radial pump

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Abstract

The operating range of turbomachines is limited in terms of the low flow rate by instabilities appearing in flow-leading parts of the machinery resulting in the creation of vortices. If the flow is further throttled, stall cells can start to propagate in the impeller at a fraction of the rotor speed. This article presents an investigation of rotating stall at different flow rates in a radial pump using time-resolved particle imaging velocimetry (PIV). This technique was used to investigate the flow field at the same position in every channel of the impeller during several revolutions. Frequency analysis was applied to the measured velocities to calculate the angular speed of the rotating stall in the impeller. The interest of time-resolved PIV to understand rotating stall is demonstrated, as it allows measurement of transient, irregularly appearing flow fields.

Keywords

Vortex Flow Field Particle Imaging Velocimetry Light Sheet Suction Side 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgments

The authors thank Dantec Dynamics GmbH for the technical support which made these experiments possible.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Lehrstuhl für Strömungsmechanik und StrömungstechnikOtto-von-Guericke-Universität MagdeburgMagdeburgGermany

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