Validation of BEM and Vortex-wake models with numerical tunnel data, TKI WoZ VortexLoads WP2
report
Within the framework of the TKI WoZ VortexLoads project, CFD simulations were carried out to verify the earlier observed differences in dynamic loading and the resultant fatigue equivalents between BEM and vortex wake codes in turbulent inflow. Hereto a ’numerical’ wind tunnel was set-up subjecting a rigid (or non-flexible) version of the AVATAR 10MW wind turbine model, which can be considered as a reference for the present turbine size. Firstly comparisons in uniform, constant inflow conditions provided a good agreement between all code types, which is a prerequisite for a consistent comparison in more challenging inflow conditions. Sheared inflow conditions demonstrated a difference in the cyclic loading amplitude between BEM and vortex / CFD models. A parameter variation study revealed this difference to scale with the magnitude of the axial induction factor. Turbulent inflow simulations were carried out to verify the influence of turbulence length scale, turbulence intensity and thrust coefficient on the observed differences between the codes.
Topics
TNO Identifier
868953
Publisher
TNO
Collation
239 p.
Place of publication
Petten