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  4. Numerical Simulation of Roughness Effects of Ice Accretion on Wind Turbine Airfoils
 
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2022
Journal Article
Title

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

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.
Author(s)
Yassin, Khaled
Kassem, Hassan  
Fraunhofer-Institut für Windenergiesysteme IWES  
Stoevesandt, Bernhard  
Fraunhofer-Institut für Windenergiesysteme IWES  
Klemme, Thomas
Peinke, Joachim  
Fraunhofer-Institut für Windenergiesysteme IWES  
Journal
Energies  
Open Access
DOI
10.3390/en15218145
Additional full text version
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Language
English
Fraunhofer-Institut für Windenergiesysteme IWES  
Keyword(s)
  • cold climate

  • ice accretion

  • wind turbine

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