Static pressure recovery analysis in the vane island diffuser of a centrifugal pump

The overall performance of a vane-island type diffuser of a centrifugal pump model was obtained by means of directional probe traverses. These measurements were performed in an air model of a real hydraulic pump for five volume flow rates. Directional probe traverses are performed with a classical t...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2016, 30(2), , pp.549-556
Main Authors: Si, Qiaorui, Dupont, Patrick, Bayeul-Lainé, Annie-Claude, Dazin, Antoine, Roussette, Olivier, Bois, Gérard
Format: Article
Language:English
Subjects:
Centrifugal pumps
Control
Diffusers
Dynamical Systems
Engineering
Engineering Sciences
Flow rate
Incidence angle
Industrial and Production Engineering
Initial conditions
Inlets
Islands
Mathematical models
Mechanical Engineering
Outlets
Particle image velocimetry
Pressure loss
Pressure recovery
Static pressure
Suction
Throats
Vanes
Velocity measurement
Vibration
기계공학
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Summary:The overall performance of a vane-island type diffuser of a centrifugal pump model was obtained by means of directional probe traverses. These measurements were performed in an air model of a real hydraulic pump for five volume flow rates. Directional probe traverses are performed with a classical three-hole probe to cover most of the complete inlet section of the diffuser from hub to shroud and from pressure to suction side. Existing Particle image velocimetry (PIV) measurement results are also used to compare probe measurement results between the inlet and outlet throats of vane island diffuser at mid-span. Some assistance from already existing unsteady calculation, including leakage effects, is used to evaluate the numerical approach capability and to correctly define the mean initial conditions at impeller’s outlet section. Pressure recovery and the measured total pressure loss levels inside this particular vane diffuser geometry are then calculated. Detailed analysis of the flow structure at the inlet section of the vane island diffuser is presented to focus on pressure evolution inside the entire diffuser section for different flow rates. The combined effects of incidence angle and blockage distributions along hub to shroud direction are found to play an important role on loss distribution in such a diffuser.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-016-0108-7