An experimental study was carried out to investigate the aeromechanics and wake characteristics of dual-rotor wind turbines (DRWTs) in either co-rotating or counter-rotating configuration, in comparison to those of a conventional single-rotor wind turbine (SRWT). The experiments were performed in a large-scale aerodynamic/atmospheric boundary layer (AABL) wind tunnel, available at Iowa State University with the oncoming atmospheric boundary-layer (ABL) airflows under neutral stability conditions. In addition to measuring the power output performance of DRWT and SRWT models, static and dynamic wind loads acting on those turbine models were also investigated. Furthermore, a high-resolution digital particle image velocimetry (PIV) system was used to quantify the flow characteristics in the near wakes of the DRWT and SRWT models. The detailed wake-flow measurements were correlated with the power outputs and wind-load measurement results of the wind-turbine models to elucidate the underlying physics to explore/optimize design of wind turbines for higher power yield and better durability.
Experimental Investigation on the Wake Characteristics and Aeromechanics of Dual-Rotor Wind Turbines
Iowa State University,
2271 Howe Hall, Room 1200,
Ames, IA 50011-2271
Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 15, 2015; final manuscript received August 10, 2015; published online October 13, 2015. Editor: David Wisler.
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Ozbay, A., Tian, W., and Hu, H. (October 13, 2015). "Experimental Investigation on the Wake Characteristics and Aeromechanics of Dual-Rotor Wind Turbines." ASME. J. Eng. Gas Turbines Power. April 2016; 138(4): 042602. https://doi.org/10.1115/1.4031476
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