A novel adaptive blade concept for large-scale wind turbines. Part II: Structural design and power performance

Capuzzi, Marco; Pirrera, Alberto; Weaver, Paul M.

doi:10.1016/j.energy.2014.04.073

Cited by 26 publications

(21 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concept's feasibility is assessed with a geometrically accurate structural model, thus improving on the analyses in [8] that were based on a two-node tapered composite beam finite element based upon work of Librescu [10]. Subsequently, the accompanying weight penalty due to stiffness tailoring is discussed.…”

Section: Design Of the Adaptive Sparmentioning

confidence: 99%

“…The feasibility of the adaptive concept identified in [7,8] is now evaluated by considering complete WT blades with a spar-plus-skin structural configuration. By adding external skins, the flapwise bending stiffness increases slightly, but twist and edgewise bending stiffnesses become significantly greater.…”

Section: Design Of the Adaptive Behaviour Into A Complete Blade Strucmentioning

confidence: 99%

“…In [8] the targeted distribution of induced elastic twist is achieved by means of material and geometrical bend-twist coupling. The former is obtained by employing mirror-symmetric unbalanced laminates on the upper and bottom cap of the box section.…”

Section: Finite Element Analysis Functional Design Of the Adaptive Sparmentioning

confidence: 99%

“…In [7] and [8] the authors presented a novel adaptive concept for a 45 m blade that was shown to simultaneously increase the yielded power and decrease the magnitude of gust-induced loads. These improvements are obtained with a distribution of bend-induced elastic twist that varies non-monotonically along the blade's span (see figure 1 for the distribution at the rated wind speed.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the resulting deformation also provides a reduction of the gust-induced loads. In [8], by means of a simple structural analysis, the novel induced twist distribution is designed into a blade, idealised as a spar (box section). The targeted adaptive behaviour is achieved by superimposing geometrical and material bend-twist couplings.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Structural design of a novel aeroelastically tailored wind turbine blade

Capuzzi

Pirrera

Weaver

2015

Thin-Walled Structures

Self Cite

View full text Add to dashboard Cite

The structural design for a recently presented aeroelastically-tailored wind turbine blade is produced. Variable elastic twist has been shown to improve performance in response to load variation across different wind conditions. This load variation is exploited as a source of passive structural morphing. Therefore, the angle of attack varies along the blade and adjusts to different operating conditions, hence improving both energy harvesting and gust load alleviation capability, below and above rated wind speed, respectively. The twist variation is achieved by purposefully designing spatially varying bendtwist coupling into the structure via tow steering and using a curved blade planform. This process enables the blade sections to twist appropriately while bending flapwise.To prove the feasibility of the proposed adaptive behaviour, a complete blade structure is analysed by using refined finite element models, with structural stability and strength constraints imposed under realistic load cases. Nonlinear structural effects are analysed as well as modal dynamic features. In addition, the weight penalty due to aeroelastic tailoring is assessed using structural optimisation studies.

show abstract

Section: Design Of the Adaptive Sparmentioning

confidence: 99%

Section: Design Of the Adaptive Behaviour Into A Complete Blade Strucmentioning

confidence: 99%

Section: Finite Element Analysis Functional Design Of the Adaptive Sparmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations