Dynamic stall control of the wind turbine airfoil via single-row and double-row passive vortex generators

Chengyong Zhu, Jie Chen, Jianghai Wu and Tongguang Wang

Energy, 2019, vol. 189, issue C

Abstract: Passive vortex generators (VGs) have been extensively used on wind turbine airfoils to delay the onset of static stall and improve the aerodynamic performance. Dynamic stall control via passive VGs, however, is still poorly understood. Therefore, this paper presents unsteady RANS simulations of the dynamic stall of the NREL S809 airfoil with and without rectangular VGs. The transitional SST k-ω model is used with VGs fully resolved. VGs are found to delay the onset of dynamic stall and greatly elevate the maximum lift coefficient by almost 40%. For single-row VGs, chordwise installation significantly changes the post-stall behavior and the flow reattachment. VGs at 15% c performs better concerning suppressing the separated flow and reducing the aerodynamic hysteresis. For double-row VGs, the second row of VGs strongly accelerates the near-wall flow and further eliminates the flow separation. This favorably leads to 57% and 39% decreases in the hysteresis intensities of lift and pitching moment coefficients, respectively. These findings suggest that passive VGs are highly promising in controlling the dynamic stall of the wind turbine airfoil.

Keywords: Dynamic stall control; Passive vortex generators; Wind turbine airfoil; RANS simulations (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054421931967X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:189:y:2019:i:c:s036054421931967x

DOI: 10.1016/j.energy.2019.116272

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().