03.1 - Aerodynamics – CFD Methods and Validation
ASSESSMENT OF EXPLICIT ALGEBRAIC REYNOLDS STRESS MODELS APPLIED TO AERONAUTICAL FLOWS
T. Chagas Silva, Instituto Tecnológico de Aeronáutica, Brazil; J.L.F. Azevedo, Instituto de Aeronáutica e Espaço, Brazil
This work is part of an ongoing effort to assess the capabilities of nonlinear turbulence models to predict tur-rnbulent flows around aeronautical configurations. In the design of complex geometries, the simpler turbulencernmodels tend to have a poor representation of the complex physical phenomena present in the flow aroundrnthese configurations. In these cases, intending to optimize such aerodynamic shapes, it is necessary to resortrnto higher fidelity turbulence models, which, in general, are capable of represent more accurately the solutionrnof the flow. Nonlinear eddy-viscosity turbulence models are an intermediate class of turbulence models ap-rnpropriate to work with the Reynolds-averaged Navier-Stokes (RANS) equations. The main advantage of thernnonlinear turbulence models is the capability to predict the flow more accurately at the same time that to keeprna computational cost similar to linear eddy-viscosity turbulence models. Two explicit algebraic Reynolds stressrnmodels (EARSM) are employed here, coupled with the 3-D RANS equations. This theoretical formulation isrnsolved by a cell-centered, finite volume method using unstructured meshes. The test cases performed to daterninclude the transonic flow over the OAT15A airfoil and the subsonic flow over the McDonnell Douglas 30P30Nrnhigh-lift airfoil. Other cases of interest in aeronautical engineering are being studied and they will also bernincluded in the final paper.