The following papers have been accepted but have not been finalized (proof reading) yet.
«« Back

Kelvin Waves Structure Analysis of a Horizontal Axis Wind Turbine Tip Vortices
Author(s): Mohamed Mehdi Oueslati, A. W. Dahmouni, S. Ben Nasrallah
Keywords: Horizontal axis wind turbine; Three-dimensional wake; Kelvin waves; velocity gradient tensor; Flow separation; Stretching-compression.
The sources of energy loses in wind turbine are always the subject of many research works. The energy lose caused by the generated wake behind the turbine is an important factor that we must investigate. To this end, a three-dimensional simulation of the flow over horizontal axis wind turbine (HAWT) model was performed using the Computational Fluid Dynamics (CFD) software Fluent 6.3.26. The Standard k-ε turbulence model based numerical results of axial velocity and wake generation are validated using experimental findings of the same HAWT model obtained in the CRTEn wind tunnel. The identification method between the velocity gradient tensor components of the first tip vortex and the Kelvin wave’s theory has been used to classify the type of deformations acting on the near wake of a horizontal axis wind turbine. The identification method shows the existence of four different Kelvin waves for different wavelengths.