Aerodynamic calculation of complex three-dimensional configurations

A three-dimensional code called ECOPAN, based on an 'inner Dirichlet' boundary condition, has been developed at ONERA. It is currently used to calculate a wide variety of complex aerodynamic configurations. Thus, the future European Ariane 5 launch vehicle has been evaluated in the takeoff phase. This decrease is moderated by a favorable interaction of Hermes wake on the lower part of the launcher. A complete Airbus aircraft has been calculated in its takeoff configuration with flaps and slats extended and with a simulation of engine primary and secondary fluxes. In these two application the ECOPAN code has demonstrated its versatility, its operational status, and its aptitude to perform parametric analyses in subsonic flow.