the present paper deals with the prediction of three-dimensional fluid flow and heat transfer in rib-roughened ducts of square cross-section. such flows are of direct relevance to the internal cooling system of modern gas turbine blades. the main objective is to assess how a recently developed variant of a cubic non-linear model (proposed by craft et al. (1999)), that has been shown to produce ...

The present paper deals with the prediction of three-dimensional fluid flow and heat transfer in rib-roughened ducts of square cross-section. Such flows are of direct relevance to the internal cooling system of modern gas turbine blades. The main objective is to assess how a recently developed variant of a cubic non-linear model (proposed by Craft et al. (1999)), that has been shown to produce ...

The object of this study is to characterize the aero-thermal performance of a rectangular turbine blade cooling channel for gas turbines equipped with turbulence promoters, square section ribs, inclined at 45 degrees with respect to the main flow direction. With this aim, a P.I.V investigation of the flow field within an inter-rib space inside four cooling channel models has been done. The pres...

In the present study, conjugate heat transfer predictions are performed for forced convection and natural convection in a twodimensional, vertical channel attached with surface mounted obstacles and having a solid wall of considerable thickness. The Streamline Upwind Petrov-Galerkin (SUPG) Finite Element (FE) method with Cartesian frame work is used for solving the equations governing Newtonian...

In this study an orthotropic slab finite element is developed to model orthotropic slabs in fire, using a layered 9-noded iso-parametric slab element and a 3-noded beam element. The element is assembled from a solid slab element which represents the continuous upper portion of the profile, and a special beam element which represents the ribbed lower portion. An equivalent width for the cross-se...