Open AccessHarmonic balance Navier‐Stokes aerodynamic analysis of horizontal axis wind turbines in yawed wind
Author(s) -
Drofelnik Jernej,
Da Ronch Andrea,
Campobasso Michele Sergio
Publication year - 2018
Publication title -
wind energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.743
H-Index - 92
eISSN - 1099-1824
pISSN - 1095-4244
DOI - 10.1002/we.2175
Subject(s) - aerodynamics , harmonic balance , turbine , wind power , solver , computational fluid dynamics , frequency domain , marine engineering , crosswind , rotor (electric) , control theory (sociology) , mechanics , engineering , aerospace engineering , computer science , physics , mechanical engineering , electrical engineering , control (management) , quantum mechanics , nonlinear system , artificial intelligence , computer vision , programming language
Multimegawatt horizontal axis wind turbines often operate in yawed wind transients, in which the resulting periodic loads acting on blades, drive‐train, tower, and foundation adversely impact on fatigue life. Accurately predicting yawed wind turbine aerodynamics and resulting structural loads can be challenging and would require the use of computationally expensive high‐fidelity unsteady Navier‐Stokes computational fluid dynamics. The high computational cost of this approach can be significantly reduced by using a frequency‐domain framework. The paper summarizes the main features of the COSA harmonic balance Navier‐Stokes solver for the analysis of open rotor periodic flows, presents initial validation results on the basis of the analysis of the NREL Phase VI experiment, and it also provides a sample application to the analysis of a multimegawatt turbine in yawed wind. The reported analyses indicate that the harmonic balance solver determines the considered periodic flows from 30 to 50 times faster than the conventional time‐domain approach with negligible accuracy penalty to the latter.