Flutter study of flapwise bend-twist coupled composite wind turbine blades

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dc.authoridFarsadi, Turac/0009-0002-8382-0313
dc.contributor.authorFarsadi, Touraj
dc.contributor.authorKayran, Altan
dc.date.accessioned2025-01-06T17:44:50Z
dc.date.available2025-01-06T17:44:50Z
dc.date.issued2021
dc.description.abstractBending-twisting coupling induced in big composite wind turbine blades is one of the passive control mechanisms which is exploited to mitigate loads incurred due to deformation of the blades. In the present study, flutter characteristics of bend-twist coupled blades, designed for load alleviation in wind turbine systems, are investigated by time-domain analysis. For this purpose, a baseline full GFRP blade, a bend-twist coupled full GFRP blade, and a hybrid GFRP and CFRP bend-twist coupled blade is designed for load reduction purpose for a 5 MW wind turbine model that is set up in the wind turbine multi -body dynamic code PHATAS. For the study of flutter characteristics of the blades, an over-speed analysis of the wind turbine system is performed without using any blade control and applying slowly increasing wind velocity. A detailed procedure of obtaining the flutter wind and rotational speeds from the time responses of the rotational speed of the rotor, flapwise and torsional deformation of the blade tip, and angle of attack and lift coefficient of the tip section of the blade is explained. Results show that flutter wind and rotational speeds of bend-twist coupled blades are lower than the flutter wind and rotational speeds of the baseline blade mainly due to the kinematic coupling between the bending and torsional deformation in bend-twist coupled blades.
dc.identifier.doi10.12989/was.2021.32.3.267
dc.identifier.endpage281
dc.identifier.issn1226-6116
dc.identifier.issn1598-6225
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85103475476
dc.identifier.scopusqualityQ2
dc.identifier.startpage267
dc.identifier.urihttps://doi.org/10.12989/was.2021.32.3.267
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3202
dc.identifier.volume32
dc.identifier.wosWOS:000635605500007
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTechno-Press
dc.relation.ispartofWind and Structures
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectwind turbine
dc.subjectcomposite blade
dc.subjectbend-twist couple
dc.subjectflutter analysis
dc.titleFlutter study of flapwise bend-twist coupled composite wind turbine blades
dc.typeArticle

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