TY - JOUR
T1 - Effects of finite aspect ratio on wind turbine airfoil measurements
AU - Kiefer, Janik
AU - Miller, Mark A.
AU - Hultmark, Marcus Nils
AU - Hansen, Martin O.L.
PY - 2016/10/3
Y1 - 2016/10/3
N2 - Wind turbines partly operate in stalled conditions within their operational cycle. To simulate these conditions, it is also necessary to obtain 2-D airfoil data in terms of lift and drag coefficients at high angles of attack. Such data has been obtained previously, but often at low aspect ratios and only barely past the stall point, where strong wall boundary layer influence is expected. In this study, the influence of the wall boundary layer on 2D airfoil data, especially in the post stall domain, is investigated. Here, a wind turbine airfoil is tested at different angles of attack and with two aspect ratios of AR = 1 and AR = 2. The tests are conducted in a wind tunnel that is pressurized up to 150 bar in order to achieve a constant Reynolds number of Rec = 3 • 106, despite the variable chord length.
AB - Wind turbines partly operate in stalled conditions within their operational cycle. To simulate these conditions, it is also necessary to obtain 2-D airfoil data in terms of lift and drag coefficients at high angles of attack. Such data has been obtained previously, but often at low aspect ratios and only barely past the stall point, where strong wall boundary layer influence is expected. In this study, the influence of the wall boundary layer on 2D airfoil data, especially in the post stall domain, is investigated. Here, a wind turbine airfoil is tested at different angles of attack and with two aspect ratios of AR = 1 and AR = 2. The tests are conducted in a wind tunnel that is pressurized up to 150 bar in order to achieve a constant Reynolds number of Rec = 3 • 106, despite the variable chord length.
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U2 - 10.1088/1742-6596/753/2/022040
DO - 10.1088/1742-6596/753/2/022040
M3 - Conference article
AN - SCOPUS:84995528728
SN - 1742-6588
VL - 753
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 2
M1 - 022040
T2 - Science of Making Torque from Wind, TORQUE 2016
Y2 - 5 October 2016 through 7 October 2016
ER -