On the Uncertainty Modeling for External Stores Aerodynamics
(English)Manuscript (Other academic)
A wind tunnel model representing a generic delta wing configurationwith external stores is considered for flutter investigations. Complexeigenvalues are estimated for the wind tunnel model for airspeeds up tothe flutter limit, and compared to eigenvalues predicted by a numericalmodel. The impact of external stores mounted to the wing tip is investigatedboth experimentally and numerically, and besides the impact of thestores as such, the capability of the numerical model to account for increasingmodel complexity is investigated. An uncertainty approach basedon robust flutter analysis is demonstrated to account for modeling imperfections.Uncertainty modeling issues and the reliability of uncertaintymodels are discussed. Provided that the present uncertainty mechanismcan be determined, it is found that available uncertainty tools may beused to efficiently compute robust flutter boundaries.
IdentifiersURN: urn:nbn:se:kth:diva-7273OAI: oai:DiVA.org:kth-7273DiVA: diva2:12232
QC 201007132007-06-012007-06-012010-07-13Bibliographically approved