Title :
Modeling of flow around a wind rotor HAWT Application to the dynamic stall
Author :
Nouioua, Ali ; Dizene, Rabah
Author_Institution :
Adv. Mech. Lab. (AML), Univ. of Sci. & Technol. Houari Boumediene (USTHB), Algiers, Algeria
Abstract :
The study of a horizontal axis wind turbine (HAWT) subject to operating conditions in the presence of wind is very complex, because the machine is subject to an instantaneous change in velocity and wind direction can lead inevitably turbine blades undergoing dynamic stall. The present work is a two-dimensional numerical simulation of the instantaneous variation of the wind direction relative to the turbine blade, compared to experimental data available in the literature. The effect of varying the angle of incidence of an S809 profile is studied using a URANS approach to predict the stall. The turbulence modeling is performed using the k-ε model and the k-ω SST. FLUENT software is used for the numerical solution of equations URANS. The results show the importance of taking into account the behavior of the unsteady flow analysis in order to obtain an accurate estimate of the aerodynamic loads acting on the turbine.
Keywords :
aerodynamics; blades; numerical analysis; rotors (mechanical); wind turbines; FLUENT software; HAWT; S809 profile; URANS approach; aerodynamic loads; dynamic stall; flow modeling; horizontal axis wind turbine; instantaneous variation; k-ε model; k-ω SST; turbine blades; turbulence modeling; two-dimensional numerical simulation; unsteady flow analysis; wind direction; wind rotor; Adaptation models; Convergence; Gold; Lead; Mathematical model; Predictive models; Turbines; CFD; Fluent; airfoil; dynamic stall; wind turbine HAWT;
Conference_Titel :
Renewable and Sustainable Energy Conference (IRSEC), 2014 International
Print_ISBN :
978-1-4799-7335-4
DOI :
10.1109/IRSEC.2014.7059768
