Please use this identifier to cite or link to this item:
Title: Stall in yawed flow conditions : a correlation of blade element momentum predictions with experiments
Authors: Haans, Wouter
Sant, Tonio
van Kuik, Gijs
van Bussel, Gerard
Keywords: Rotors
Wind turbines
Wind turbines -- Aerodynamics
Issue Date: 2006
Publisher: The American Institute of Aeronautics and Astronautics (AIAA)
Citation: Haans, W., Sant, T., van Kuik, G., & van Bussel, G. (2006). Stall in yawed flow conditions: a correlation of blade element momentum predictions with experiments. Journal of Solar Energy Engineering, 128(4), 472-480.
Abstract: Yawed flow conditions introduce unsteady loads in a wind turbine that affect generated power quality and fatigue life. An unsteady phenomenon of special concern is dynamic stall, due to the significant load fluctuations associated with it. Although the assumptions underlying BEM models are totally inadequate in yawed flow conditions, these models, modified with engineering models, are still widely used in industry. It is therefore relevant to assess the capabilities of BEM models in predicting the location of dynamic stall on the blade for a rotor in yawed flow conditions. A rotor model is placed in an open jet wind tunnel and tested in yawed flow conditions. The locations of dynamic stall on the blade of a rotor model as a function of the blade position are observed. Two experimental techniques are used; tufts glued to the blade and hot-film anemometry in the near wake. The results from the two techniques are compared and possible causes for differences are identified. Furthermore, the rotor model in yaw is modelled with a simple BEM model, utilizing a Gormont dynamic stall model. The regions of dynamic stall on the blades predicted by the BEM model are compared with the experimental results. The BEM model seems capable of a crude prediction of the dynamic stall locations found for the rotor model in yawed flow conditions.
Appears in Collections:Scholarly Works - FacEngME

Files in This Item:
File Description SizeFormat 
OA - Stall in Yawed Flow Conditions A Correlation of Blade Element Momentum Predictions With Experiments.pdf
  Restricted Access
777.74 kBAdobe PDFView/Open Request a copy

Items in OAR@UM are protected by copyright, with all rights reserved, unless otherwise indicated.