Articles | Volume 6, issue 3
https://doi.org/10.5194/wes-6-715-2021
https://doi.org/10.5194/wes-6-715-2021
Research article
 | 
25 May 2021
Research article |  | 25 May 2021

A simplified model for transition prediction applicable to wind-turbine rotors

Thales Fava, Mikaela Lokatt, Niels Sørensen, Frederik Zahle, Ardeshir Hanifi, and Dan Henningson

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Cited articles

Arnal, D. and Casalis, G.: Laminar-turbulent transition prediction in three-dimensional flows, Prog. Aerosp. Sci., 36, 173–191, https://doi.org/10.1016/S0376-0421(00)00002-6, 2000. a
Bak, C., Bitsche, R. D., Yde, A., and Kim, T.: Light Rotor: The 10-MW reference wind turbine, in: Proceedings of EWEA 2012 – European Wind Energy Conference & Exhibition, 16–19 April 2012, Copenhagen, Denmark, 2012. a
Bertolotti, F. P., Herbert, T., and Spalart, P. R.: Linear and nonlinear stability of the Blasius boundary layer, J. Fluid Mech., 242, 441–474, 1992. a
Bippes, H.: Basic experiments on transition in three-dimensional boundary layers dominated by crossflow instability, Prog. Aerosp. Sci., 35, 363–412, https://doi.org/10.1016/S0376-0421(99)00002-0, 1999. a
Borodulin, V. I., Ivanov, A. V., Kachanov, Y. S., Mischenko, D. A., Örlü, R., Hanifi, A., and Hein, S.: Experimental and theoretical study of swept-wing boundary-layer instabilities. Three-dimensional Tollmien–Schlichting instability, Phys. Fluids, 31, 1–18, https://doi.org/10.1063/1.5125812, 2019. a
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This work develops a simplified framework to predict transition to turbulence on wind-turbine blades. The model is based on the boundary-layer and parabolized stability equations, including rotation and three-dimensionality effects. We show that these effects may promote transition through highly oblique Tollmien–Schlichting (TS) or crossflow modes at low radii, and they should be considered for a correct transition prediction. At high radii, transition tends to occur through 2D TS modes.
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