Adaptive computation of aeroacoustic sources for a 4-wheel rudimentary landing gear benchmark problem
2010 (English)Conference paper (Refereed)
We present our simulation results for the benchmark Rudimentary Landing Gear 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 computational mesh is adaptively re ned with respect to an a posteriori error estimate of a quantity of interest in the computation, in this case drag force. Turbulent boundary layers are modeled using a simple wall shear stress proportional to the skin friction, which here is assumed to be small and is approximated by zero skin friction, resulting in a slip velocity boundary condition. 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.
Place, publisher, year, edition, pages
Computer and Information Science
IdentifiersURN: urn:nbn:se:kth:diva-58721OAI: oai:DiVA.org:kth-58721DiVA: diva2:473848
Workshop on Bechmark Problems Airframe Noise Computation (BANC-I) Stockholm
QC 201201092012-01-082012-01-082012-01-09Bibliographically approved