The truly time-variant unsteady flow in a low specific speed radial diffuser pump stage has been investigated by time-resolved Particle Image Velocimetry (PIV) measurements. The measurements are conducted at the midspan of the blades for the design condition and also for some severe part-load conditions. The instantaneous flow fields among different impeller channels are analyzed and compared in detail, and more attention has been paid to flow separations at part-load conditions. The analysis of the measured results shows that the flow separations at two adjacent impeller channels are quite different at some part-load conditions. The separations generally exhibit a two-channel characteristic.
Time-Resolved Particle Image Velocimetry (PIV) Measurements in a Radial Diffuser Pump
Feng, J, Benra, F, & Dohmen, HJ. "Time-Resolved Particle Image Velocimetry (PIV) Measurements in a Radial Diffuser Pump." Proceedings of the ASME 2009 Fluids Engineering Division Summer Meeting. Volume 1: Symposia, Parts A, B and C. Vail, Colorado, USA. August 2–6, 2009. pp. 323-329. ASME. https://doi.org/10.1115/FEDSM2009-78297
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