Influence of aeroelastically tailored wing extensions and winglets on whirl flutter stability

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Scopus citations

Abstract

An aeroelastic stability model with coupled rotor, pylon, and wing degrees of freedom has been developed and analyzed. The research is focused on understanding the effect of a wing extension and winglet on whirl flutter stability. Composite tailoring of wings, as well as wing extensions, is investigated for potential benefits to wing mode stability. The results indicate that wing extensions can significantly increase both wing beam mode and torsion mode damping, and the flutter speeds of beam mode and torsion mode are increased by 60 knots and 80 knots, respectively; and their influence on wing chord mode is minimal. Tuning the beam-bending stiffness of the wing extensions can increase the whirl flutter speed by 80 knots through damping exchanges between the wing beam and torsion modes. The composite tailoring of wing and wing extension box beams has the potential to increase both wing beam and chord mode stability margins with only slight decrease of damping of wing torsion mode. Parametric studies of winglets show that damping of wing modes is sensitive to winglet geometry such as cant, sweep and toe.

Original languageEnglish (US)
Title of host publicationAmerican Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013
PublisherAmerican Helicopter Society International
Pages188-200
Number of pages13
ISBN (Print)9781632662828
StatePublished - Jan 1 2013
Event2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013 - Tianjin, China
Duration: Sep 8 2013Sep 11 2013

Publication series

NameAmerican Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013

Other

Other2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013
Country/TerritoryChina
CityTianjin
Period9/8/139/11/13

All Science Journal Classification (ASJC) codes

  • Automotive Engineering

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