Numerical simulation of flow field in water-pump sump and inlet suction pipe
TypeArticles dans des revues avec comité de lecture
There are several important considerations in the design of a suction supply sump. It is imperative that the amount of turbulence and entrained air be kept to a minimum. Free aircore vortex occurring at a water-intake pipe is an important problem encountered in hydraulic engineering. These vortices may reduce pump performances, have large effects on the operating conditions and lead to increase plant operating costs. Experiments, conducted in order to select best positions of the suction pipe of a water intake sump, show qualitative results concerning flow disturbances in the pump-intake related to sump geometries and position of the pump intake. The purpose of the paper is to reproduce the flow pattern and confirm the geometrical parameter influences of the flow behavior in such a pump. The numerical model used solves the Reynolds averaged Navier-Stokes (RANS) equations and VOF multiphase model for two cases. In the validation of this numerical model, emphasis was placed on the prediction of the number, location, size and strength of the various types of vortices. Previous studies, without simulation of air entrainment, have shown the influence on a single type of mesh with different cell numbers, different intake pipe depths and different water levels, for two turbulence models closure.
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BAYEUL-LAINE, Annie-Claude; SIMONET, Sophie; ISSA, Abir; BOIS, Gérard (2013)Numerous different experimental and numerical methods have been developed and are already improved in order to get rather good flow descriptions inside pump components. These calculations are generally realized assuming ...
ISSA, Abir; BAYEUL-LAINE, Annie-Claude; BOIS, Gérard (CMFF - Conference on Modelling Fluid Flow, 2009)Water for irrigation, domestic and industrial supply as well for some power generation is normally drawn directly from rivers or from reservoir through sumps. The flow at the pump section sump may have large effects on the ...
ISSA, Abir; BAYEUL-LAINE, Annie-Claude; BOIS, Gérard (IAHR - The International Association for Hydro-Environment Engineering and Research, 2008)Two fundamental types of flow problems besetting water intakes are swirling flow problems in the pump sump and sediment problems at entrance or within intakes. Both problems reduce intake performance and lead to increased ...
Two-phase numerical study of the flow field formed in water pump sump: influence of air entrainment BAYEUL-LAINE, Annie-Claude; SIMONET, Sophie; BOIS, Gérard; ISSA, Abir (IOP - Institute of Physics, 2012)In a pump sump it is imperative that the amount of non-homogenous flow and entrained air be kept to a minimum. Free air-core vortex occurring at a water-intake pipe is an important problem encountered in hydraulic engineering. ...
CHERDIEU, Patrick; DAZIN, Antoine; DUPONT, Patrick; BAYEUL-LAINE, Annie-Claude; ROUSSETTE, Olivier; BOIS, Gérard (2013)The aim of this article is to present experimental results obtained on a fan composed of a radial impeller matched with a vaned diffuser. There is no volute downstream to the diffuser. Consequently the diffuser outlet is ...