Numerical study of the influence of Geometrical Parameters on flow in water Pump-Sump
TypeCommunications avec actes
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 pump performances and the operating conditions. The flow patterns in the sump are mainly determined by the shape and scale of the sump. However, it’s not always possible to design a sump pump to provide uniform and stable flow to pumps, due to site constraints. For example in some cases air entraining (surface and subsurface vortex) occurs. These vortices may reduce pump performances and lead to increase plant operating costs. It becomes essential to investigate the pump sump to avoid these non uniformities inlet flow problems. Two approaches (experimental and numerical) are generally followed for such investigation. The numerical approach usually used solves the Reynolds averaged Navier-Stokes (RANS) equations with a near-wall turbulence model. In the validation of this numerical model, emphasis was placed on the prediction of the number, the location, the size and the strength of the various types of vortices. A previous study done by the same hauteur of this one , has 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. The present paper mainly focuses, first, on the effect of pump intake location in the sump and secondly on the effect of several inlet velocity gradients at inlet sump section.
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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 ...
BAYEUL-LAINE, Annie-Claude; BOIS, Gérard; ISSA, Abir (IOP - Institute of Physics, 2010)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 ...
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. ...
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 ...
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 ...