Classical flutter analysis of composite wind turbine blades including compressibility

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dc.authoridFarsadi, Turac/0009-0002-8382-0313
dc.contributor.authorFarsadi, Touraj
dc.contributor.authorKayran, Altan
dc.date.accessioned2025-01-06T17:37:03Z
dc.date.available2025-01-06T17:37:03Z
dc.date.issued2021
dc.description.abstractFor wind turbine blades with the increased slenderness ratio, flutter instability may occur at lower wind and rotational speeds. For long blades, at the flutter condition, relative velocities at blade sections away from the hub center are usually in the subsonic compressible range. In this study, for the first time for composite wind turbine blades, a frequency domain classical flutter analysis methodology has been presented including the compressibility effect only for the outboard blade sections, which are in the compressible flow regime exceeding Mach 0.3. Flutter analyses have been performed for the baseline blade designed for the 5-MW wind turbine of NREL. Beam-blade model has been generated by making analogy with the structural model of the prewisted rotating thin-walled beam (TWB) and variational asymptotic beam section (VABS) method has been utilized for the calculation of the sectional properties of the blade. To investigate the compressibility effect on the flutter characteristics of the blade, frequency and time domain aeroelastic analyses have been conducted by utilizing unsteady aerodynamics via incompressible and compressible indicial functions. This study shows that with use of compressible indicial functions, the effect of compressibility can be taken into account effectively in the frequency domain aeroelastic stability analysis of long blades whose outboard sections are inevitably in the compressible flow regime at the onset of flutter.
dc.description.sponsorshipRUZGEM-Center for Wind Energy Research
dc.description.sponsorshipRUZGEM-Center for Wind Energy Research
dc.identifier.doi10.1002/we.2559
dc.identifier.endpage91
dc.identifier.issn1095-4244
dc.identifier.issn1099-1824
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85089199078
dc.identifier.scopusqualityQ1
dc.identifier.startpage69
dc.identifier.urihttps://doi.org/10.1002/we.2559
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2099
dc.identifier.volume24
dc.identifier.wosWOS:000557540700001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofWind Energy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectcomposite blade
dc.subjectcompressibility
dc.subjectflutter
dc.subjectindicial unsteady aerodynamics
dc.subjectwind turbine
dc.titleClassical flutter analysis of composite wind turbine blades including compressibility
dc.typeArticle

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