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An Experimental Study of the Flow Field Inside the Diffuser Passage of a Laboratory Centrifugal Pump

Article dans une revue avec comité de lecture
Auteur
SI, Qiaorui
DUPONT, Patrick
120930 Centrale Lille
ccBAYEUL-LAINÉ, Annie-Claude
ccDAZIN, Antoine
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
ROUSSETTE, Olivier
YUAN, Shouqi

URI
http://hdl.handle.net/10985/9563
DOI
10.1115/1.4029671
Date
2015
Journal
Journal of Fluids Engineering

Résumé

Measurements are processed on a centrifugal pump model, which works with air and performs with the vane-island type diffuser of a real hydraulic pump, under five flow rates to investigate the internal flow characteristics and their influence on overall pump performance. The mean flow characteristics inside the diffuser are determined by using a miniature three-hole probe connected to an online data acquisition system. The flow structure at the inlet section of the diffuser is analyzed in detail, with a focus on the local pressure loss inside the vaneless gap and incidence angle distributions along the hub-to-shroud direction of the diffuser. Some existing calculations, including leakage effects, are used to evaluate the pressure recovery downstream of the impeller. Furthermore, particle image velocimetry (PIV) measurement results are obtained to help analyze the flow characteristics inside the vane-island diffuser. Each PIV measuring plane is related to one particular diffuser blade-to-blade channel and is analyzed by using the time-averaged method according to seven different relative positions of the impeller. Measurement results show that main loss is produced inside the vaneless part of the diffuser at low flow rates, which might have been caused by the strong rotor–stator interaction. When the impeller flow rate is greater than the diffuser design flow rate, a large fluctuating separated region occurs after the throat of the diffuser on the pressure side. Mean loss originates from the unsteady pressure downstream of the diffuser throat. For better characterization of the separations observed in previous experimental studies, complementary unsteady static pressure measurement campaigns have been conducted on the diffuser blade wall. The unsteadiness revealed by these measurements, as well as theirs effects on the diffuser performance, was then studied.

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Documents liés

Visualiser des documents liés par titre, auteur, créateur et sujet.

  • Leakage Flow Influence on SHF pump model performances 
    Article dans une revue avec comité de lecture
    DUPONT, Patrick; BOIS, Gérard; ROUSSETTE, Olivier; SI, Qiaorui; ccDAZIN, Antoine; ccBAYEUL-LAINÉ, Annie-Claude (Korean Society for Fluid Machinery, 2015)
    This paper deals with the influence of leakage flow existing in SHF pump model on the analysis of internal flow behaviour inside the vane diffuser of the pump model performance using both experiments and calculations. PIV ...
  • Leakage flow simulation in a specific pump model 
    Article dans une revue avec comité de lecture
    DUPONT, Patrick; BOIS, Gérard; ROUSSETTE, Olivier; SI, Qiaorui; ccDAZIN, Antoine; ccBAYEUL-LAINÉ, Annie-Claude (IOP, 2014)
    This paper deals with the influence of leakage flow existing in SHF pump model on the analysis of internal flow behaviour inside the vane diffuser of the pump model performance using both experiments and calculations. PIV ...
  • Static pressure recovery analysis in the vane island diffuser of a centrifugal pump 
    Article dans une revue avec comité de lecture
    SI, Qiaorui; DUPONT, Patrick; ccBAYEUL-LAINÉ, Annie-Claude; ccDAZIN, Antoine; ROUSSETTE, Olivier; BOIS, Gérard (Springer, 2016)
    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 ...
  • Comparaisons between numerical calculations and measurements in the vaned diffusor of SHF impeller 
    Communication avec acte
    DUPONT, Patrick; CHERDIEU, Patrick; BOIS, Gérard; ROUSSETTE, Olivier; ccDAZIN, Antoine; ccBAYEUL-LAINÉ, Annie-Claude (2012)
    The paper presents analysis of the performance and the internal flow behaviour in the vaned diffusor of a radial flow pump using PIV technique and pressure probe traverses. PIV measurements have been performed at mid height ...
  • INVESTIGATIONS IN A VANED DIFFUSER OF SHF IMPELLER 
    Communication avec acte
    DUPONT, Patrick; CAVAZZINI, Giovanna; CHERDIEU, Patrick; BOIS, Gérard; ROUSSETTE, Olivier; ccDAZIN, Antoine; ccBAYEUL-LAINÉ, Annie-Claude (2013)
    The paper presents the numerical and experimental analysis of performance and internal flow behaviour in the vaned diffuser of a radial flow pump (Fig. 1) using PIV technique (Fig. 2), pressure probe traverses and numerical ...

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