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CFD modeling of porous media in the study of the flow at penstock intake of A 1:30 model of guri hydro-powerhouse

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dc.contributor.author Arevalo, Angela
dc.contributor.author Montilla, Gonzalo
dc.contributor.author Rojas-Solorzano, L.
dc.contributor.author Reyes, Miguel
dc.contributor.author Marín, Juan
dc.date.accessioned 2015-12-04T04:36:05Z
dc.date.available 2015-12-04T04:36:05Z
dc.date.issued 2006
dc.identifier.citation Arevalo, Angela; Montilla, Gonzalo; Rojas-Solorzano, L.; Reyes, Miguel; Marín, Juan; 2006, CFD modeling of porous media in the study of the flow at penstock intake of A 1:30 model of guri hydro-powerhouse, http://nur.nu.edu.kz/handle/123456789/851 ru_RU
dc.identifier.uri http://nur.nu.edu.kz/handle/123456789/851
dc.description.abstract The transient free surface flow within a 1:30 model of the intake (penstock) to Power House II of Guri Hydro-Power Plant (Venezuela) is studied. The geometry of the model includes a reservoir of 4.31 meters upstream the dam. Geometric details and appropriate boundary conditions were reproduced mathematical and numerically using CFD (Computational Fluid Dynamics) techniques, running the commercial code CFXTM 4.4. The flow features nearby and within the penstock were captured. Special attention was paid to the evaluation of air entrainment that might eventually form due to the presence of free surface vortices. The computational domain included the anti-debris screen at the entrance of the penstock, considering it as a porous medium with equivalent permeability and porosity. Most of simulated cases corresponded to conditions in the prototype Guri´s free surface level of 240 a.s.l. (above sea level), with flow rate of 450 m3/seg. Air and water were considered incompressible fluids with and homogeneous interfacial transport model. Computed velocity profiles at different sections of the reservoir and pressure head along the penstock are compared with experiments. The numerical model captures the influence of the porous medium, used to simulate the anti-debris grill, onto the free-surface and pressure head within the penstock. In order to improve the predictive capabilities of the numerical model and to diminish the instabilities caused by the hydrostatic pressure condition at the entrance of the computational reservoir, preliminary results including a porous wall at the upstream boundary are presented. The porous wall, in fact, mimics the water-calming rock wall placed at the entrance of the experimental reservoir and proved to be a relevant element in improving the CFD predictions ru_RU
dc.language.iso en ru_RU
dc.publisher CIMENICS MF-185-2006 ru_RU
dc.subject Research Subject Categories::TECHNOLOGY::Engineering mechanics ru_RU
dc.subject mechanical engineering ru_RU
dc.title CFD modeling of porous media in the study of the flow at penstock intake of A 1:30 model of guri hydro-powerhouse ru_RU
dc.type Article ru_RU

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