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Case Studies, Papers & Promotions
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| External Aerodynamic Simulation of FA-18 Aircraft
17 February 2004
 The Process
Numerical flow simulation is a three step process when starting from a given CAD geometry. First a mesh is generated for the configuration to be analysed, followed by the solution of the Navier-Stokes equations. Finally the results are analyzed using post-processing and visualization tools. The original CAD file is either imported from the CatiaV4 model using the ICEMCFD/CATIA/TETIN direct CAD interface translator, or imported as an IGES file via the ICEMCFD/IGES/DDN translator. In case no CAD model is available, it is created using ICEMCFD/DDN. If needed, the CAD/CAM model can be
modified using the MED or ICEMCFD/DDN modules. For parametric studies, the COMAK (COnfiguration MAKer) module of ICEM CFD is used. The flow solvers employed by RUAG Aerospace use structured grids, which are generated using ICEMCFD HEXA.
The Benefits
The use of ICEMCFD COMAK and the replay capability of ICEMCFD HEXA are well suited for studies carried out at RUAG Aerospace in which different control surface deflection angles or different geometrical configurations need to be analysed.
The ICEMCFD HEXA capability to work with sub-topologies permits to generate meshes on various configurations of the model by just merging the requested sub-topologies. This has been extensively used to attach fuel tanks and missiles on the FA-18 fighter and to determine the aerodynamic load distributions on wing, fuselage and empennage.
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