A numerical study on flow through the spiral casing of a hydraulic turbine

Biswas, G. ; Eswaran, V. ; Ghai, G. ; Gupta, A. (1998) A numerical study on flow through the spiral casing of a hydraulic turbine International Journal for Numerical Methods in Fluids, 28 (1). pp. 143-156. ISSN 0271-2091

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/%28SICI...

Related URL: http://dx.doi.org/10.1002/(SICI)1097-0363(19980715)28:1<143::AID-FLD708>3.0.CO;2-H


Flow through the spiral casing of a hydraulic turbine was analyzed. Reynolds averaged Navier-Stokes equations were solved using a finite element method. The physical domain was divided into a number of hexahedral elements which are isoparametrically mapped onto standard cubic elements. Numerical integration for the unsteady momentum equation is performed over such hexahedral elements to obtain a provisional velocity field. Compliance with the mass conservation equation and determination of the pressure correction are accomplished through an iterative procedure. The velocity distribution inside the spiral casing corroborates the results available in literature. The static pressure at the midplane generally decreases from the outside wall towards the exit of the spiral casing.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Turbine; Spiral Casing; Finite Element Method; Galerkin Weighted Residual Technique; Gauss-Legendre Quadrature
ID Code:59886
Deposited On:07 Sep 2011 14:22
Last Modified:07 Sep 2011 14:22

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