Colloquium: Muhammad Arsalan Khan (AWE)

07 augustus 2018 13:00 - Locatie: Lecture room F, Faculty of Aerospace Engineering, Kluyverweg 1, Delft.

Dynamic Stall Modeling for Wind Turbines

Wind turbines frequently operate at off-design conditions and undergo dynamic loads characterized by unsteady aerodynamics. Predicting these loads is difficult, especially when operating near stall regime where dynamic stall is prominent. The aim of this research was to investigate the performance of dynamic stall models in yawed and standstill conditions by using current state-of-the-art engineering models and validating the results with New MEXICO experiments. The first part of the research dealt with analysis of New MEXICO data in standstill and yawed conditions. The second part was concerned with validating dynamic stall models implemented in ECN’s aeroelastic tool: Aero-Module. Lastly, a case study was performed on the AVATAR rotor to access the effect of dynamic stall models on aerodynamic damping and onset of aeroelastic instabilities. The research was able to shed light on our current understanding of dynamic stall phenomenon and the way we model it.