Numerical study of straight-bladed Darrieus-type tidal turbine
- 1 May 2009
- journal article
- Published by Thomas Telford Ltd. in Proceedings of the Institution of Civil Engineers - Energy
- Vol. 162 (2), 67-76
- https://doi.org/10.1680/ener.2009.162.2.67
Abstract
This paper presents developments in numerical simulations of a cross-flow vertical-axis marine current turbine (straight-bladed Darrieus type) with particular emphasis on rotor-performance prediction and hydrodynamic loads for structural design calculations. This study initially used theoretical double-multiple-streamtube models, followed by physical testing on a scaled-down model turbine and primarily numerical simulations. Numerical investigations of a proposed full-scale turbine (power coefficient, blade loads and flow behaviour) were undertaken using the developed computational models. The turbine design was studied using a time-accurate Reynolds-averaged Navier–Stokes (RANS) commercial solver. A transient-rotor-stator model with a moving mesh technique was used to capture the change in flow field at a particular time step. A shear stress-transport k−ω turbulence model was used to model turbulent features of the flow. The numerical results show good agreement with experimental measurements and the the...Keywords
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