2D RANS Simulation of Floating VAWT in Roll Motion
Background
A simple 2D Reynolds-Averaged Navier-Stokes (RANS) simulation of a floating vertical axis wind turbine (VAWT) in roll motion, sliced by a top view. Under this view, the problem is reduced to a set of turbine airfoils rotating around their axis. With a horizontal freestream velocity, the roll motion can be modelled as a vertical vibration with a certain period.
Physics Setup
- Airfoil shape: NACA0015
- Angular velocity: $6\pi$ rad/s
- Freestream velocity: $7$ m/s
- Chord length: $0.225$ m
- Radius: $0.85$ m
- Angle of incidence: $6^\circ$
Grid Generation
A 2D unstructured grid is generated with Star-CCM+ automated mesher.
- Simulation Domain
- $L\times W=40\ \mathrm{m}\times20\ \mathrm{m}$
- Background Mesh
- Cell Count: 77377
- Cell Type: Quadrilateral
- Overset Mesh
- Cell Count: 14316
- Cell Type + Prism Layers
- First layer thickness: that of $y^+=30$
