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2013
Conference Paper
Titel
3D-Rotational effects - A lesson to learn from the MEXCIO experiment
Abstract
A computational fluid dynamics (CFD) simulation has been evaluated for a setup of the Mexico-rotor experiment in respect to 3D flow effects. The chosen simulation was at an inflow velocity U = 24 m/s which showed decent agreement between measurements and simulation in pressure values on the blade sections as well as for radial traverses in the wake. The observed 3D flow phenomenon were strongly influenced by the separated flow in the inner section of the blade. However, the characteristics of the radial flow on the blade surface, seems to have been influenced by the transition from different airfoil types chosen in the Mexico experiment. Also a vortex phenomenon in the mid-span region of the blade was observed in the wake, which also could be caused by the transition between airfoil types. This could explain a drop in axial velocity in the measurements of the Mexico experiment.