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David Wood, University of Calgary: Unsteady Behaviour of Smartfoils
Recent modelling and experimental work on airfoils with vortex generators and actuated trailing edge flaps has investigated transient aerodynamic loads with application to wind turbine blades during pitch adjustment. The ONERA dynamic stall model has been extended and the impact of vortex generators investigated, a PID-controlled-flap was found experimentally to substantially reduce transient loads, and dynamic stall measurements have been made over much larger ranges of incidence angle than previously investigated. These results are applicable to VAWTs during normal operation. The ultimate aim of this work is to develop an impulse-based unsteady blade element model that can be used in real time for turbine control..