Numerical simulation of tower rotor interaction for downwind wind turbine

Isam Janajreh, Ilham Talab, Jill MacPherson

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Downwind wind turbines have lower upwind rotor misalignment, and thus lower turning moment and self-steered advantage over the upwind configuration. In this paper, numerical simulation to the downwind turbine is conducted to investigate the interaction between the tower and the blade during the intrinsic passage of the rotor in the wake of the tower. The moving rotor has been accounted for via ALE formulation of the incompressible, unsteady, turbulent Navier-Stokes equations. The localized CP, CL, and C D are computed and compared to undisturbed flow evaluated by Panel method. The time history of the CP, aerodynamic forces (CL and CD), as well as moments were evaluated for three cross-sectional tower; asymmetrical airfoil (NACA0012) having four times the rotor's chord length, and two circular cross-sections having four and two chords lengths of the rotor's chord. 5, 17, and 57 reductions of the aerodynamic lift forces during the blade passage in the wake of the symmetrical airfoil tower, small circular cross-section tower and large circular cross-section tower were observed, respectively. The pronounced reduction, however, is confined to a short time/distance of three rotor chords. A net forward impulsive force is also observed on the tower due to the high speed rotor motion.

Original languageBritish English
Article number860814
JournalModelling and Simulation in Engineering
StatePublished - 2010


Dive into the research topics of 'Numerical simulation of tower rotor interaction for downwind wind turbine'. Together they form a unique fingerprint.

Cite this