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Appropriate dynamic-stall models for performance predictions of VAWTs with NLF blades

Christian Masson, Christophe Leclerc and Ion Paraschivoiu

Article (1998)

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Cite this document: Masson, C., Leclerc, C. & Paraschivoiu, I. (1998). Appropriate dynamic-stall models for performance predictions of VAWTs with NLF blades. International Journal of Rotating Machinery, 4(2), p. 129-139. doi:10.1155/s1023621x98000116
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This paper illustrates the relative merits of using Natural Laminar Flow (NLF) airfoils in the design of Vertical Axis Wind Turbines (VAWT). This is achieved by the application of the double-multiple-streamtube model of Paraschivoiu to the performance predictions of VAWTs equipped with conventional and NLF blades. Furthermore, in order to clearly illustrate the potential benefit of reducing the drag, the individual contributions of lift and drag to power are presented. The dynamic-stall phenomena are modelled using the method of Gormont as modified by several researchers. Among the various implementations of this dynamic-stall model available in the literature, the most appropriate and general for NLF applications has been identified through detailed comparisons between predicted performances and experimental data. This selection process is presented in the paper. It has been demonstrated that the use of NLF airfoils in VAWT applications can lead to significant improvements with respect to conventional design only in a very low wind speed range, the extent of which is negligible with respect to the VAWT operational wind speeds.

Uncontrolled Keywords

VAWT, Double-Multiple-Streamtube Model, Dynamic Stall, NLF Airfoil

Open Access document in PolyPublie
Subjects: 2100 Génie mécanique > 2100 Génie mécanique
2100 Génie mécanique > 2108 Génie aérospatial, aéronautique et automobile
Department: Département de génie mécanique
Research Center: Non applicable
Date Deposited: 17 Sep 2019 16:58
Last Modified: 18 Sep 2019 01:20
PolyPublie URL: https://publications.polymtl.ca/3666/
Document issued by the official publisher
Journal Title: International Journal of Rotating Machinery (vol. 4, no. 2)
Publisher: Hindawi
Official URL: https://doi.org/10.1155/s1023621x98000116


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