Open AccessPower coefficient measurements of a novel vertical axis wind turbine
Author(s) -
Hilewit Doma,
Matida Edgar A.,
Fereidooni Amin,
Abo el Ella Hamza,
Nitzsche Fred
Publication year - 2019
Publication title -
energy science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 29
ISSN - 2050-0505
DOI - 10.1002/ese3.412
Subject(s) - vertical axis wind turbine , turbine , airfoil , tip speed ratio , chord (peer to peer) , wind power , aerodynamics , wind tunnel , lift coefficient , marine engineering , hypersonic wind tunnel , wind speed , power (physics) , environmental science , wake , mechanics , aerospace engineering , physics , meteorology , engineering , electrical engineering , reynolds number , computer science , distributed computing , turbulence , quantum mechanics
Wind tunnel experiments were performed to evaluate the power coefficients of three vertical axis wind turbines ( VAWT s), namely, (a) conventional VAWT (two‐bladed troposkien shape), (b) novel 50% shifted troposkien shape‐vertical axis wind turbine (50% STS ‐ VAWT ), and (c) novel 100% STS ‐ VAWT . All turbines had the same height, swept area, and NACA 0015 airfoil with the same chord length. During the power coefficient measurements for each one of the turbines, the wind tunnel velocity was varied while the turbine rotation was kept constant through rheostatic load adjustment. Two different turbine rotations were used (600 rpm and 700 rpm). The resulting tip speed ratios ( TSR s) ranged from approximately 2 to 6 in the current investigation. Both the power coefficients and the tip speed ratios were corrected against wind tunnel blockage effects. The 50% STS ‐ VAWT model showed an overall better aerodynamic performance (both corrected and uncorrected power coefficients) when compared against the other two configurations, likely due to a combination of (a) power generation increased due to blade‐wake interaction ( BWI ) reductions and (b) power generation capacity related to the blade length of each turbine.