Investigation of Dynamic Loading for 13.2 MW Downwind Pre-Aligned Rotor

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dc.contributorUniversity of Virginiaen
dc.contributorNational Renewable Energy Laboratory (U.S.)en
dc.contributorVirginia Tech. Aerospace and Ocean Engineering Departmenten
dc.contributor.authorQin, Chaoen
dc.contributor.authorLoth, Ericen
dc.contributor.authorLee, Sangen
dc.contributor.authorMoriarty, Patricken
dc.date.accessioned2015-07-28T18:27:08Zen
dc.date.available2015-07-28T18:27:08Zen
dc.date.issued2015-06en
dc.description.abstractTo alleviate the mass-scaling issues associated with conventional upwind rotors of extreme-scale turbines, a downwind rotor concept is considered that uses fixed coning to align the non-circumferential loads for a given steady-state condition. This alignment can be pre-set to eliminate downwind blade moments for a given steady-state condition at rated wind speed and to minimize them for other conditions. The alleviation in downwind dynamic loads may enable a reduced structural blade mass as compared with a conventional upwind rotor. To examine the potential impact of this design, FAST simulations were conducted for a 13.2 MW rated turbine at steady-state conditions for two rotor configurations with similar power outputs: 1) a conventional upwind rotor with three blades and 2) a downwind pre-aligned rotor with two blades. The rotor mass was reduced by approximately 25% for the downwind pre-aligned configuration. In addition, the damage equivalent loads on the blades were reduced more than 60% for the downwind pre-aligned configuration. However, additional work is needed to investigate this concept at turbulent inflow conditions and for extreme events.en
dc.description.notesSession 7A - Research and Development, and Technologyen
dc.format.extent22 pagesen
dc.format.mimetypeapplication/vnd.ms-powerpointen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationQin, C., Loth, E., Lee, S., & Moriarty, P. (2015, June). Investigation of dynamic loading for 13.2 mw downwind pre-aligned rotor. Paper presented at the North American Wind Energy Academy 2015 Symposium, Blacksburg, VA.en
dc.identifier.urihttp://hdl.handle.net/10919/54674en
dc.language.isoen_USen
dc.publisherVirginia Techen
dc.relation.ispartofNorth American Wind Energy Academy 2015 Symposiumen
dc.rightsIn Copyrighten
dc.rights.holderQin, Chaoen
dc.rights.holderLoth, Ericen
dc.rights.holderLee, Sangen
dc.rights.holderMoriarty, Patricken
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleInvestigation of Dynamic Loading for 13.2 MW Downwind Pre-Aligned Rotoren
dc.typePresentationen
dc.type.dcmitypeTexten
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