Time-resolved particle imaging velocimetry for the investigation of rotating stall in a radial pump
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...
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| Veröffentlicht in: | Experiments in fluids 2005-08, Vol.39 (2), p.192-201 |
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| creator | KRAUSE, N ZÄHRINGER, K PAP, E |
| description | 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. |
| doi_str_mv | 10.1007/s00348-005-0935-2 |
| format | Article |
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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. 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| ispartof | Experiments in fluids, 2005-08, Vol.39 (2), p.192-201 |
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| language | eng |
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| subjects | Applied fluid mechanics Biological and medical applications Exact sciences and technology Flow rate Fluid dynamics Fluid flow Fundamental areas of phenomenology (including applications) Hydraulic and pneumatic machinery Imaging Impellers Instrumentation for fluid dynamics Metrological applications Optics Physics Rotating stalls Velocimetry Velocity measurement |
| title | Time-resolved particle imaging velocimetry for the investigation of rotating stall in a radial pump |
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