the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Aerodynamic Performance of the NREL S826 Airfoil in Icing Conditions
Abstract. The demand for wind power is rapidly increasing, creating opportunities for wind farm installations in more challenging climates. Cold climate areas, where ice accretion can be an issue, are often sparsely populated and have high wind energy potential. Icing may lead to severely reduced aerodynamic performance and thereby reduced power output. To reach a greater understanding of how icing affects the aerodynamics of a wind turbine blade, three representative icing cases; rime ice, glaze ice and a mixed ice, were defined and investigated experimentally and computationally. Experiments at Re = 1.0 × 105–4.0 × 105 were conducted in the low-speed wind tunnel at NTNU on a two dimensional wing with applied 3D-printed ice shapes, determining lift, drag and surface pressure distributions. Computational results, obtained from the Reynolds Averaged Navier–Stokes fluid dynamics code FENSAP, complement the experiments. Measured and predicted data show a reduction in lift for all icing cases. Most severe is the mixed ice case, with a lift reduction of up to 30 % in the linear lift area, compared to a clean reference airfoil. Computational results show an under-prediction in maximum lift of 7–18 % compared to experimental values. Curvature and tendencies for both lift and drag show good agreement between simulations and experiment.
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Interactive discussion
- RC1: 'Does not contribute much to the state of the art', Anonymous Referee #1, 16 Nov 2017
- RC2: 'Review', Anonymous Referee #2, 28 Nov 2017
- AC1: 'AC1: "Author's responses to the comments by Referee #1"', Julie Krøgenes, 07 Jan 2018
- AC2: '"Author's responses to the comments by Referee #2"', Julie Krøgenes, 07 Jan 2018
Interactive discussion
- RC1: 'Does not contribute much to the state of the art', Anonymous Referee #1, 16 Nov 2017
- RC2: 'Review', Anonymous Referee #2, 28 Nov 2017
- AC1: 'AC1: "Author's responses to the comments by Referee #1"', Julie Krøgenes, 07 Jan 2018
- AC2: '"Author's responses to the comments by Referee #2"', Julie Krøgenes, 07 Jan 2018
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Cited
4 citations as recorded by crossref.
- Aerodynamics of an airfoil with leading‐edge icing M. Vinnes & R. Hearst 10.1002/we.2603
- Parameterising the Impact of Roughness Evolution on Wind Turbine Performance J. Kelly et al. 10.3390/wind2020022
- Experimental and Numerical Icing Penalties of an S826 Airfoil at Low Reynolds Numbers R. Hann et al. 10.3390/aerospace7040046
- Impact and mitigation of blade surface roughness effects on wind turbine performance J. Kelly et al. 10.1002/we.2691