Abstract
This paper presents a finite-volume method for simulating flows through complex hydroturbine draft-tube configurations using near-wall turbulence closures. The method employs the artificial-compressibility pressure-velocity coupling approach in conjunction with multigrid acceleration for fast convergence on very fine grids. Calculations are carried out for a draft tube with two downstream piers on a computational mesh consisting of 1.2×106 nodes. Comparisons of the computed results with measurements demonstrate the ability of the method to capture most experimental trends with reasonable accuracy. Calculated three-dimensional particle traces reveal very complex flow features in the vicinity of the piers, including horse-shoe and longitudinal vortices and regions of flow reversal.
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© 1996 Springer Science+Business Media Dordrecht
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Ventikos, Y., Sotiropoulos, F., Patel, V.C. (1996). Modelling Complex Draft-Tube Flows using Near-Wall Turbulence Closures. In: Cabrera, E., Espert, V., Martínez, F. (eds) Hydraulic Machinery and Cavitation. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-9385-9_13
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DOI: https://doi.org/10.1007/978-94-010-9385-9_13
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