Articles | Volume 5, issue 2
Wind Energ. Sci., 5, 759–773, 2020

Special issue: Wind Energy Science Conference 2019

Wind Energ. Sci., 5, 759–773, 2020
Research article
18 Jun 2020
Research article | 18 Jun 2020

First characterization of a new perturbation system for gust generation: the chopper

Ingrid Neunaber and Caroline Braud

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Cited articles

Alves Portela, F., Papadakis, G., and Vassilicos, J. C.: The turbulence cascade in the near wake of a square prism, J. Fluid Mech., 825, 315–352,, 2017. a
Aubrun, S., Loyer, S., Hancock, P., and Hayden, P.: Wind turbine wake properties: Comparison between a non-rotating simplified wind turbine model and a rotating model, J. Wind Eng. Indust. Aerodynam., 120, 1–8, 2013. a
Bangga, G.: Three-Dimensional Flow in th Root Region of Wind Turbine Rotors, PhD thesis, University of Stuttgart, Stuttgart, Germany, 2018. a
Bardal, L. M. and Sætran, L. R.: Wind gust factors in a coastal wind climate, Energy Proced., 94, 417–424, 2016. a, b
Bartl, J., Mühle, F., Schottler, J., Sætran, L., Peinke, J., Adaramola, M., and Hölling, M.: Wind tunnel experiments on wind turbine wakes in yaw: effects of inflow turbulence and shear, Wind Energ. Sci., 3, 329–343,, 2018. a, b
Short summary
Motivated by the need for wind turbine rotor blade tests in flows with atmospheric-like properties like gusts, we present a new setup to generate strong, rapid, turbulent gusts in a wind tunnel. The setup consists of a rotating bar that cuts through the inlet of the wind tunnel which generates the gust, and it is called the chopper. In this work, the flow generated by the chopper is characterized, and we show how the gust and its turbulence evolve downstream.