Instability of the helical tip vortices behind: a wind turbine
(English)Article in journal (Other academic) Submitted
A numerical study on a single wind turbine wake has been carried out focusing on the instability onset of the trailed tip vortices shed from the turbine blades. The numerical model is based on large-eddy simulations of the Navier– Stokes equations using the actuator line method to simulate the wake and the tip vortices, using the EllipSys3D general purpose 3D Navier–Stokes solver. Data from the Tjæreborg wind turbine is used in the analysis. Dynamic mode decomposition (DMD) is utilized for analysis of the wind turbine near wake. This method allows for extraction of dominant coherent structures from the flow, leading to an improved understanding of the flow physics and underlying instability mechanisms.
IdentifiersURN: urn:nbn:se:kth:diva-120584OAI: oai:DiVA.org:kth-120584DiVA: diva2:615786
QS 20132013-04-122013-04-122013-04-12Bibliographically approved