Assessment of turbulence modelling for CFD simulations into hydroturbines: spiral casings
Paper i proceeding, 2003

Spiral casings are applied to distribute the water, as evenly as possible, to the stay vanes and wicket gates and then to the turbine runner. In a well-designed spiral casing, the pressure head of the fluid should be made available to the runner with minimum loss, hence the analysis of the flow through a spiral casing is important for the design of efficient hydraulic turbines. The goal of this work is based on turbo machines spiral casings three-dimensional flow modeling, simulation and characterization. Governing equations related to their study are used in the mathematical modeling part. Therefore, several turbulence models available will be tested with a finite volume method based commercial software CFX 5.5.1 which generates default tetrahedral meshing. Qualitative and quantitative results validation are proved by workshop benchmark experiments already done, in order these results can obtain a turbulence model that represents better the flow complexity inside spiral casings.

spiral casings

CFD

Turbulence Models

Numerical simulation

Författare

Luis C. Eduardo Oliveira de Souza

Marcelo Dias de Moura

Antonio C.P. Brasil Junior

Håkan Nilsson

Chalmers, Institutionen för termo- och fluiddynamik

17th International Mechanical Engineering Congress (COBEM 2003) at São Paulo (Brazil)

Ämneskategorier

Strömningsmekanik och akustik