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Modelling dynamic stall of an airfoil with vortex generators using a double-wake panel model with viscous-inviscid interaction
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  • Wei YU,
  • Lukas Bajarūnas,
  • Alessandro Zanon,
  • Carlos Simao Ferreira
Wei YU
DUWIND - TUDelft

Corresponding Author:w.yu@tudelft.nl

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Lukas Bajarūnas
Delft University of Technology Faculty of Aerospace Engineering
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Alessandro Zanon
AIT Austrian Institute of Technology
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Carlos Simao Ferreira
Delft University of Technology
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Abstract

Vortex generators (VGs) have been widely applied to wind turbines thanks to their potential to increase aerodynamic performance. Due to the complex inflow perceived by a rotor and the proneness to flow separation, VGs on wind turbines usually experience highly unsteady flow. While there are models that exist to simulate the steady effects of VGs, we lack a fast and efficient tool to model the unsteady performance of airfoils equipped with VGs. This paper adopts an unsteady double-wake panel model with viscous-inviscid interaction developed to simulate a vertical axis turbine in dynamic stall, adding the capability of predicting the dynamic aerodynamic performance of VG-equipped airfoils. The results of a series of steady and unsteady cases of an airfoil with different VG configurations in various pitch motions in free and forced transition are verified against experimental data. Results show that the double wake model offers sufficient accuracy results compared to experimental data to claim the model’s validity in a preliminary evaluation of an airfoil’s capability to prevent stall with VGs. While a few limitations are still identified for improvement, the model’s accuracy in predicting the transition location, separation and reattachment, and drag forces into future development.
29 Aug 20231st Revision Received
30 Aug 2023Submission Checks Completed
30 Aug 2023Assigned to Editor
30 Aug 2023Review(s) Completed, Editorial Evaluation Pending
01 Oct 2023Reviewer(s) Assigned
06 Nov 2023Editorial Decision: Revise Minor
14 Nov 20232nd Revision Received
14 Nov 2023Submission Checks Completed
14 Nov 2023Assigned to Editor
14 Nov 2023Review(s) Completed, Editorial Evaluation Pending