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Efficient Laplace-Domain Aerodynamics for Load Analyses
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Flight Dynamics. (Flight Dynamics)ORCID iD: 0000-0002-3199-8534
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Flight Dynamics. (Flight Dynamics)
2013 (English)Conference paper (Refereed)
Abstract [en]

An existing finite-element solver for steady, non-linear subsonic flow is extended in order to treat unsteady potential flow problems in the Laplace domain. The numerical formulation makes use of unstructured meshes including explicitly modelled, triangulated wake surfaces. Meshes can contain both linear and quadratic volume and surface elements, thus allowing to favor either very fast solution times or high spatial resolution. Aeroelastic problems are dealt with by modelling moving or deforming bodies by means of transpiration boundary conditions. Deformations of the aerodynamic mesh are computed either by projection of aerodynamic mesh nodes onto the finite elements of a structural shell model, or by radial basis function interpolation suitable for beam-type structural models. In addition to simple validation cases, an application of the solver for the evaluation of gust loads on a commuter aircraft is presented. In order to evaluate the use of the method in the context of a relevant, industrial-scale load analysis, typical geometrical and structural models for a twin-turboprop aircraft in the 15t-class (e.g. Saab 340, CN-235, Dash 8, Do 328) are employed.

Place, publisher, year, edition, pages
Bristol, 2013.
Keyword [en]
Aeroelasticity, Flight Loads, Unsteady Aerodynamics
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-124309ScopusID: 2-s2.0-84907301240OAI: diva2:633996
International Forum on Aeroelasticity and Structural Dynamics,24-26 June 2013, Bristol
Vinnova, DNr 2009-01340

QC 20130719

Available from: 2013-06-28 Created: 2013-06-28 Last updated: 2013-07-19Bibliographically approved

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Eller, DavidJansson, Natascha
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