@inproceedings{7fe51896552247008864b0b6c41c3fb3,
title = "Experimental comparison of a NACA0021 airfoil in large plunging and surging motions at 90º angle of attack",
abstract = "The topic of vortex-induced vibrations on a wind turbine blade has recently gained much attention due to its growing size and flexibility. To address this concern, a wind tunnel test was conducted to study the forced plunging and surging motion of a NACA0021 airfoil at 90° angle of attack. Results indicate that vortex lock-in occurred for a motion amplitude of one chord length even for a small frequency ratio (between motion frequency and static Strouhal frequency) of 0.39. Analysis of the drag coefficient, derived from the phase-averaged Particle Image Velocimetry (PIV) data, shows that a plunging airfoil experiences higher average loading than a surging airfoil, which is deemed to be more harmful considering the higher loading in the crossflow-direction due to the variation of effective angle of attack.",
author = "Guanqun Xu and Wei Yu and Carlos Ferreira and Andrea Sciacchitano and Sowmya Iyer",
year = "2024",
doi = "10.1088/1742-6596/2767/2/022047",
language = "English",
series = "Journal of Physics: Conference Series",
publisher = "IOP Publishing",
number = "2",
booktitle = "The Science of Making Torque from Wind (TORQUE 2024): Aerodynamics, aeroelasticity, and aeroacoustics",
address = "United Kingdom",
}