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Numerical Solutions for the Cawapi Configuration on Unstructured Grids at KTH/FOI, Sweden: Part I
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
FOI.
2009 (English)In: Understanding and Modeling Vortical Flows to Improve the Technology Readiness Level for Military Aircraft, 2009Chapter in book (Other academic)
Abstract [en]

Steady and unsteady viscous simulations of a full-scale, semi-span and full-span model of the F-16XL-1 aircraft at seven different flight Reynolds/Mach number combinations have been performed with an unstructured CFD code. The steady-state simulations are with several turbulence models of different complexity. Detached-Eddy Simulation (DES) has been used to compute the unsteady flow. The computed results are compared with public domain flight-test data. Very good agreement is demonstrated for surface pressure distribution, local skin friction and boundary velocity profiles. The different turbulence models performed almost equally well, except the Spalart-Allmaras model, which failed to predict the flow qualitatively and quantitatively. The Differential Reynolds Stress Model (DRSM) outperformed all other models when it comes to local span-wise skin friction. DES was superior over RANS modeling at the highest angle of attack, where the flow over the outer wing is separated and partly unsteady.

Place, publisher, year, edition, pages
2009.
Series
NATO RTO Technical Report, AVT-113
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-25337OAI: oai:DiVA.org:kth-25337DiVA: diva2:357503
Note
QC 20101018Available from: 2010-10-18 Created: 2010-10-18 Last updated: 2011-03-24Bibliographically approved

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