A study of rotating stall in a vaneless diffuser of radial flow pump
Article dans une revue avec comité de lecture
Abstract
Rotating stall in a vaneless diffuser of radial flow pump is studied. The measurements consist of: (i) unsteady pressure measurements delivered by two microphones; and (ii) nine steady pressure taps mounted in one radial line to measure the pressure recovery in the vaneless diffuser. Spectrum analysis was used to identify and characterize rotating stall. An assumption was made to estimate the losses in the vaneless diffuser to evaluate the effect of the instability development on its performance. The result has shown that the arising of rotating stall has a positive effect on the diffuser performance. Two possible reasons are proposed: (1) a blockage in the diffuser due to the unstable cells which shortens the streamlines and decreased the friction losses along the vaneless diffuser; (2) the topology of rotating stall cells results in the convection of fluid coming from outside part of the pump model to the vaneless diffuser.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureDUPONT, Patrick; BOIS, Gérard; ROUSSETTE, Olivier; SI, Qiaorui; DAZIN, Antoine; BAYEUL-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 ...
-
An Experimental Study of the Flow Field Inside the Diffuser Passage of a Laboratory Centrifugal Pump Article dans une revue avec comité de lectureSI, Qiaorui; DUPONT, Patrick; BAYEUL-LAINÉ, Annie-Claude; DAZIN, Antoine; ROUSSETTE, Olivier; YUAN, Shouqi (American Society of Mechanical Engineers, 2015)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 ...
-
Article dans une revue avec comité de lectureDUPONT, Patrick; BOIS, Gérard; ROUSSETTE, Olivier; SI, Qiaorui; DAZIN, Antoine; BAYEUL-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 ...
-
Article dans une revue avec comité de lectureSI, Qiaorui; DUPONT, Patrick; BAYEUL-LAINÉ, Annie-Claude; DAZIN, 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 ...
-
Article dans une revue avec comité de lectureJIANG, Qifeng; HENG, Yaguang; LIU, Xiaobing; ZHANG, Weibin; BOIS, Gérard; SI, Qiaorui (MDPI, 2019)Most of the pumps working under two phase flows conditions are used in petroleum industry applications, like electrical submersible pumps (ESP) for hydrocarbon fluids, in chemistry, nuclear industries and in agriculture ...