Stability analysis of the tip vortices of a wind turbine
2008 (English)In: 46th AIAA Aerospace Sciences Meeting and Exhibit, 2008Conference paper (Refereed)
The aim of the present project is to get a better understanding of the stability properties of wakes generated by wind turbine rotors. To determine the stability properties of wind turbine wakes a numerical study on the stability of the tip vortices behind the Tjaereborg wind turbine has been carried out. The numerical model is based on large eddy simulations of the Navier-Stokes equations using the actuator line method to generate the wake and the tip vortices. To determine critical frequencies the flow is perturbed by inserting a harmonic perturbation. The results show that the instability is dispersive and that growth arise only for some specific frequencies and type of modes.
Place, publisher, year, edition, pages
Critical frequencies, Harmonic perturbations, Numerical models, Numerical studies, Specific frequencies, Stability analysis, Stability properties, Tip vortex, Wind turbine rotors, Wind turbine wakes, Aerodynamics, Aerospace engineering, Computer simulation, Flow control, Navier Stokes equations, Wakes, Wind power, Wind tunnels, Wind turbines, Stability
IdentifiersURN: urn:nbn:se:kth:diva-153987ScopusID: 2-s2.0-78149442902ISBN: 9781563479373OAI: oai:DiVA.org:kth-153987DiVA: diva2:761646
46th AIAA Aerospace Sciences Meeting and Exhibit, 7 January 2008 through 10 January 2008, Reno, NV, United States
QC 201411072014-11-072014-10-102014-11-07Bibliographically approved