| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1513343 | Energy Procedia | 2012 | 8 Pages |
A blade-element momentum method has been developed for a vertical-axis wind turbine, including both dynamic stall and dynamic inflow. A number of “ghost” blades are defined about the rotor azimuth, in addition to the two or three real blades. The flow is allowed to evolve naturally on each blade (both real and ghost) according to the dynamic stall model. This provides a continuous record of forces at each point on the rotor, from which dynamic inflow can be calculated. A simple mass-spring-damper model was created representing the surge displacement of a floating VAWT. Comparisons against existing methods, which employ an iterative, quasi-steady calculation of induced velocity, show that dynamic inflow makes little difference to the response of the platform under typical operating conditions.
