Numerical Simulation of Roughness Effects of Ice Accretion on Wind Turbine Airfoils

Khaled Yassin (), Hassan Kassem, Bernhard Stoevesandt, Thomas Klemme and Joachim Peinke
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Khaled Yassin: ForWind-Centre for Wind Energy Research, Institute of Physics, University of Oldenburg, 26129 Oldenburg, Germany
Hassan Kassem: Fraunhofer Institute for Wind Energy Systems, Küpkersweg 70, 26129 Oldenburg, Germany
Bernhard Stoevesandt: Fraunhofer Institute for Wind Energy Systems, Küpkersweg 70, 26129 Oldenburg, Germany
Thomas Klemme: Senvion GmbH, Überseering 10, 22297 Hamburg, Germany
Joachim Peinke: ForWind-Centre for Wind Energy Research, Institute of Physics, University of Oldenburg, 26129 Oldenburg, Germany

Energies, 2022, vol. 15, issue 21, 1-20

Abstract: One of the emerging problems in modern computational fluid dynamics is the simulation of flow over rough surfaces. A good example of these rough surfaces is wind turbine blades with ice formation on its leading edge. Instead of resolving the airflow field using a fine computational grid near the wall, rough wall functions (RWFs) can be used to model the flow behavior in case of the presence of roughness. This work aims to investigate the performance of state-of-the-art RWFs to show which of these models can provide the most accurate results with the lowest computational cost possible. This aim is achieved by comparing coefficients of lift and pressure resulting from CFD simulations with wind tunnel results of an airfoil with actual ice profiles collected from the site. The RWFs are used to simulate airflow field over the airfoil profiles with ice profile attached to its leading edge using OpenFOAM CFD framework. The comparison of the numerical simulations and the wind tunnel measurements showed that the Colebrook RWF provided the best agreement between simulation and experimental results while using about 20% of the number of cells used with smooth RWF.

Keywords: ice accretion; cold climate; wind turbine (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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