Resumo:
By using the finite volume method and SOLA algorithm, the study of turbulent twodimensional
flow in a toroidal regenerative turbomachine is carried out. The equations
representing the movement in cartesian coordinates are transformed into a coordinate system
developed specially for this machine. The two-equation turbulence model κ−ε and the
convective scheme “QUICK” are used. The resulting equation system is solved by using
Choleski method. Results for the slip factor, head coefficient, and vorticity are presented and
compared with literature. Along the development of the present Thesis until the study of
toroidal regenerative turbomachine, two tests were carried out: first, the laminar flow in the
cascade flat plates was analyzed in order to check the behavior of the computational program
in this situation. Second, a comparison between Smagorinsky Subgrid Model and Velocity
Structure Function Model was made using the finite volume method, applied to the flow in
transition to turbulence in backward facing step, in order to familiarize with large edge
simulation, that is a modern turbulence model with great perspective to the future.
