Offshore floating vertical axis wind turbines, dynamics modelling state of the art. part I: Aerodynamics

Borg, Michael; Shires, Andrew; Collu, Maurizio

doi:10.1016/j.rser.2014.07.096

Cited by 165 publications

(70 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Today, it is mainly with off-shore applications in mind that VAWTs are being considered as a viable alternative for horizontal-axis wind turbines (HAWTs), see e.g. [2] or [3].…”

Section: Introductionmentioning

confidence: 99%

Wind tunnel experiments of a pair of interacting vertical-axis wind turbines

Vergaerde

Troyer

Kluczewska-Bordier

et al. 2018

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract.Vertical-axis wind turbines (VAWTs) have received a renewed interest in the wind energy research community, mainly for off-shore applications. One advantage is that installing a pair of counterrotating VAWTs on the same floating platform would result in thrust reduction and potential cancellation of the mooring yaw moment. In addition, such configurations could benefit from increased power output and reduced wake losses.In this article, we report on wind tunnel experiments to study the mechanical power output of a reference VAWT scale model, tested individually and in a closely-spaced pair of VAWTs. The power output of the individual VAWT configuration is compared with a pair of VAWTs spaced 1.3 diameters apart for two counterrotating directions. A net power increase in the power coefficient for the paired configuration of up to 17.0 % compared with two individual rotors has been observed.

show abstract

“…Today, it is mainly with off-shore applications in mind that VAWTs are being considered as a viable alternative for horizontal-axis wind turbines (HAWTs), see e.g. [2] or [3].…”

Section: Introductionmentioning

confidence: 99%

Wind tunnel experiments of a pair of interacting vertical-axis wind turbines

Vergaerde

Troyer

Kluczewska-Bordier

et al. 2018

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…In addition, other efforts on comparative study of HAWTs and VAWTs have also been made by several researchers to reveal the merits and feasibilities of each concept, including Paraschivoiu (2002), Islam et al (2013), and Jamieson (2011). Borg et al (2014) compared VAWTs with HAWTs in technology, conversion efficiency, upscaling, fatigue, machinery position, etc. Wang et al (2014) conducted a comparative study of a FVAWT with a 5 MW Darrieus rotor (Vita, 2011) and a FHAWT with the NREL 5 MW wind turbine , both mounted on the OC4 semisubmersible platform (Robertson et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…A semi-submersible type FVAWT with a 5 MW Darrieus rotor mounted on the OC4 DeepCwind semi-submersible (Robertson et al, 2012) was proposed and analyzed by Wang et al (2013). A spar type FVAWT with the same rotor placed on the OC3 Hywind spar buoy (Jonkman, 2010) was also put forward by Borg and Collu (2014) and Cheng et al (2015). Fully coupled aero-hydro-servo-elastic dynamic simulations were carried out for the FVAWTs.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of Three Floating Wind Turbine Concepts with a Two-Bladed Darrieus Rotor

Cheng¹,

Wang²,

Gao³

et al. 2015

JOWE

View full text Add to dashboard Cite

Recently, interest in the development of floating vertical axis wind turbines (FVAWTs) has been increasing, since FVAWTs might prove to be one of the optimal configurations in deep waters. In this study, a FVAWT with a 5 MW Darrieus rotor was used as the reference wind turbine and was mounted on three different floating support structures: the OC3 spar buoy, the OC4 semi-submersible, and a tension leg platform (TLP). Fully coupled nonlinear time domain simulations using the code SIMO-RIFLEX-DMS were conducted. A series of load cases with turbulent wind and irregular waves was carried out to investigate the dynamic responses of these three FVAWT concepts by estimating the generator power production, the platform motions, the tower base bending moments, and the mooring line loads. For the spar, semi-submersible, and TLP FVAWT concepts, twice-per-revolution (2P) effects resulting from the 2P aerodynamic loads are prominent in the dynamic responses of these concepts. Because of the compliant catenary mooring systems, the spar and the semisubmersible can help to mitigate the 2P effects on structural loads and mooring line tensions as compared to the TLP concept, at the cost of larger platform motions. The TLP is not a good substructure for a vertical axis wind turbine unless the cyclic variation of aerodynamic loads is significantly reduced.

show abstract

“…The pursuit of reducing the cost of offshore wind energy in deep waters has led to a re-emerging interest in vertical-axis wind turbines (VAWTs) for floating applications due to apparent advantages over conventional horizontal-axis wind turbines (HAWTs) [1,2,3]. In parallel, there is a resurgence of interest in VAWTs as a promising alternative to HAWTs also for small-scale electric power in urban areas [4].…”

Section: Introductionmentioning

confidence: 99%

“…It is perhaps the offshore environment that has attracted the greatest interest for VAWTs because of several inherent attributes that offer advantages with respect to HAWTs, particularly the scalability and low over-turning moments with better accessibility to drive train components [6,7].…”

Section: Introductionmentioning

confidence: 99%

3D URANS analysis of a vertical axis wind turbine in skewed flows

Orlandi

Collu

Zanforlin

et al. 2015

Journal of Wind Engineering and Industrial Aerodynamics

Self Cite

View full text Add to dashboard Cite

The article demonstrates the potential of an unsteady RANS 3D approach to predict the effects of skewed winds on the performance of an H-type vertical-axis wind turbine (VAWT). The approach is validated through a comparison between numerical and experimental results for a full-scale Darrieus turbine, demonstrating an improved prediction ability of 3D CFD with respect to both 2D CFD and semi-empirical models based on the double multiple stream tubes method. A 3D URANS approach is then adopted to investigate the power increase observed for a straight-bladed small-scale turbine in a wind tunnel when the rotational axis is inclined from 0 • to 15 • from the vertical. The main advantage of this approach is a more realistic description of complex three-dimensional flow characteristics, such as dynamic stall, and the opportunity to derive local blade flow conditions on any blade portion during upwind and downwind paths. Consequently, in addition to deriving the turbine overall performance in terms of power coefficient, a better insight into the temporal and spatial evolution of the physical mechanisms is obtained. Our principal finding is that the power gain in skewed flows is obtained during the downwind phase of the revolution as the end part of the blade is less disturbed by the wake generated during the upwind phase.

show abstract

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. part I: Aerodynamics

Cited by 165 publications

References 41 publications

Wind tunnel experiments of a pair of interacting vertical-axis wind turbines

Wind tunnel experiments of a pair of interacting vertical-axis wind turbines

Dynamic Response Analysis of Three Floating Wind Turbine Concepts with a Two-Bladed Darrieus Rotor

3D URANS analysis of a vertical axis wind turbine in skewed flows

Contact Info

Product

Resources

About