Predicting wind turbine blade loads using vorticity transport and RANS methodologies

Timothy M. Fletcher, Richard Brown, Da Hye Kim, Oh Joon Kwon

Research output: Contribution to conferencePaper

8 Citations (Scopus)

Abstract

Two computational methods, one based on the solution of the vorticity transport equation, and a second based on the solution of the Reynolds-Averaged Navier-Stokes equations, have been used to simulate the aerodynamic performance of a horizontal axis wind turbine. Comparisons have been made against data obtained during Phase VI of the NREL Unsteady Aerodynamics Experimental and against existing numerical data for a range of wind conditions. The Reynolds-Averaged Navier-Stokes method demonstrates the potential to predict accurately the flow around the blades and the distribution of aerodynamic loads developed on them. The Vorticity Transport Model possesses a considerable advantage in those situtations where the accurate, but computationally efficient, modelling of the structure of the wake and the associated induced velocity is critical, but where the prediction of blade loads can be achieved with sufficient accuracy using a lifting-line model augmented by incorporating a semi-empirical stall delay model. The largest benefits can be extracted when the two methods are used to complement each other in order to understand better the physical mechanisms governing the aerodynamic performance of wind turbines.

Conference

ConferenceEuropean Wind Energy Conference and Exhibition, EWEC 2009
CityMarseilles, France
Period16/03/0919/03/09

Fingerprint

Turbine Blade
Wind Turbine
Vorticity
Aerodynamics
Wind turbines
Turbomachine blades
Blade
Methodology
Aerodynamic loads
Reynolds Equation
Wake
Computational methods
Navier-Stokes
Transport Equation
Computational Methods
Navier Stokes equations
Navier-Stokes Equations
Horizontal
Complement
Model

Keywords

  • vorticity transport equation
  • wind turbine blade loads
  • RANS
  • aerodynamic performance

Cite this

Fletcher, T. M., Brown, R., Kim, D. H., & Kwon, O. J. (2009). Predicting wind turbine blade loads using vorticity transport and RANS methodologies. Paper presented at European Wind Energy Conference and Exhibition, EWEC 2009, Marseilles, France, .
Fletcher, Timothy M. ; Brown, Richard ; Kim, Da Hye ; Kwon, Oh Joon. / Predicting wind turbine blade loads using vorticity transport and RANS methodologies. Paper presented at European Wind Energy Conference and Exhibition, EWEC 2009, Marseilles, France, .
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author = "Fletcher, {Timothy M.} and Richard Brown and Kim, {Da Hye} and Kwon, {Oh Joon}",
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note = "European Wind Energy Conference and Exhibition, EWEC 2009 ; Conference date: 16-03-2009 Through 19-03-2009",

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Fletcher, TM, Brown, R, Kim, DH & Kwon, OJ 2009, 'Predicting wind turbine blade loads using vorticity transport and RANS methodologies' Paper presented at European Wind Energy Conference and Exhibition, EWEC 2009, Marseilles, France, 16/03/09 - 19/03/09, .

Predicting wind turbine blade loads using vorticity transport and RANS methodologies. / Fletcher, Timothy M.; Brown, Richard; Kim, Da Hye; Kwon, Oh Joon.

2009. Paper presented at European Wind Energy Conference and Exhibition, EWEC 2009, Marseilles, France, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Predicting wind turbine blade loads using vorticity transport and RANS methodologies

AU - Fletcher, Timothy M.

AU - Brown, Richard

AU - Kim, Da Hye

AU - Kwon, Oh Joon

PY - 2009/3/16

Y1 - 2009/3/16

N2 - Two computational methods, one based on the solution of the vorticity transport equation, and a second based on the solution of the Reynolds-Averaged Navier-Stokes equations, have been used to simulate the aerodynamic performance of a horizontal axis wind turbine. Comparisons have been made against data obtained during Phase VI of the NREL Unsteady Aerodynamics Experimental and against existing numerical data for a range of wind conditions. The Reynolds-Averaged Navier-Stokes method demonstrates the potential to predict accurately the flow around the blades and the distribution of aerodynamic loads developed on them. The Vorticity Transport Model possesses a considerable advantage in those situtations where the accurate, but computationally efficient, modelling of the structure of the wake and the associated induced velocity is critical, but where the prediction of blade loads can be achieved with sufficient accuracy using a lifting-line model augmented by incorporating a semi-empirical stall delay model. The largest benefits can be extracted when the two methods are used to complement each other in order to understand better the physical mechanisms governing the aerodynamic performance of wind turbines.

AB - Two computational methods, one based on the solution of the vorticity transport equation, and a second based on the solution of the Reynolds-Averaged Navier-Stokes equations, have been used to simulate the aerodynamic performance of a horizontal axis wind turbine. Comparisons have been made against data obtained during Phase VI of the NREL Unsteady Aerodynamics Experimental and against existing numerical data for a range of wind conditions. The Reynolds-Averaged Navier-Stokes method demonstrates the potential to predict accurately the flow around the blades and the distribution of aerodynamic loads developed on them. The Vorticity Transport Model possesses a considerable advantage in those situtations where the accurate, but computationally efficient, modelling of the structure of the wake and the associated induced velocity is critical, but where the prediction of blade loads can be achieved with sufficient accuracy using a lifting-line model augmented by incorporating a semi-empirical stall delay model. The largest benefits can be extracted when the two methods are used to complement each other in order to understand better the physical mechanisms governing the aerodynamic performance of wind turbines.

KW - vorticity transport equation

KW - wind turbine blade loads

KW - RANS

KW - aerodynamic performance

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M3 - Paper

ER -

Fletcher TM, Brown R, Kim DH, Kwon OJ. Predicting wind turbine blade loads using vorticity transport and RANS methodologies. 2009. Paper presented at European Wind Energy Conference and Exhibition, EWEC 2009, Marseilles, France, .