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Adaptive computation of aeroacoustic sources for a rudimentary landing gear using lighthill's analogy
KTH, Skolan för datavetenskap och kommunikation (CSC), Numerisk analys, NA (stängd 2012-06-30).
KTH, Skolan för datavetenskap och kommunikation (CSC), Numerisk analys, NA (stängd 2012-06-30).ORCID-id: 0000-0002-5020-1631
KTH, Skolan för datavetenskap och kommunikation (CSC), Numerisk analys, NA (stängd 2012-06-30).ORCID-id: 0000-0003-4256-0463
2011 (engelsk)Inngår i: 17th AIAA/CEAS AeroacousticsConference 2011: 32nd AIAA Aeroacoustics Conference, 2011Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

We present our simulation results for the benchmark problem of the ow past a Rudimentary Landing Gear (RLG) using a General Galerkin (G2) nite element method, also referred to as Adaptive DNS/LES. In G2 no explicit subgrid model is used, instead the compuational mesh is adaptively re ned with respect to an a posteriori error es-timate of a quantity of interest in the computation, in this case the drag force on the RLG. Turbulent boundary layers are modeled using a simple wall layer model with the shear stress at walls proportional to the skin friction, which here is assumed to be small and, therefore, can be approximated by zero skin friction. We compare our results with experimental data and other state of the art computations, where we nd good agreement in sound pressure levels, surface velocities and ow separation. We also compare with detailed surface pressure experimental data where we nd largely good agreement, apart from some local dierences for which we discuss possible explanations.

sted, utgiver, år, opplag, sider
2011.
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Identifikatorer
URN: urn:nbn:se:kth:diva-68735Scopus ID: 2-s2.0-84883113997OAI: oai:DiVA.org:kth-68735DiVA, id: diva2:485251
Konferanse
32nd AIAA Aeroacoustics Conference. Portland, Oregon, USA. 5 – 8 June 2011
Merknad

QC 20120416

Tilgjengelig fra: 2012-01-28 Laget: 2012-01-28 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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Jansson, NiclasHoffman, Johan

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