The influence of wing twist on pressure distribution and flow topology

J. Kiefer, N. N. Sorensen, Marcus Nils Hultmark, M. O.L. Hansen

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Empirical data serve as the foundation to computational modeling in the initial stages of the wind turbine design process. In case of aerodynamic simulations, the empirical input is comprised of lift and drag data obtained in quasi two-dimensional wind tunnel tests. In the simulations, the global flow over an entire blade is finally approximated as a spatial summation of the obtained 2-D data, which stands in strong contrast to the true operation of a wind turbine and consequently leads to a higher level of uncertainty. Especially, the near-root region of the blade experiences highly three-dimensional flow conditions, particularly in regions of the blade where the flow separates from the airfoil. This study aims to accentuate the difference between airfoil data obtained in quasi two-dimensional wind tunnel tests compared to airfoil data from a wing with an imposed three-dimensional spanwise pressure gradient. For this, a geometrically altered wing section with a spanwise twist is tested in a wind tunnel and compared to CFD computations.

Original languageEnglish (US)
Article number022036
JournalJournal of Physics: Conference Series
Issue number2
StatePublished - Jun 19 2018
Event7th Science of Making Torque from Wind, TORQUE 2018 - Milan, Italy
Duration: Jun 20 2018Jun 22 2018

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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