Abstract: A flow evacuation system for an aircraft engine including an engine nozzle that conveys the engine exhaust flow and an eductor receiving the engine exhaust flow and engine ventilation flow is disclosed. The engine nozzle has a final section in contact by its outer surface with the ventilation flow. The engine exhaust flow has a low swirl when the engine operates under design conditions and a high swirl when the engine operates out of design conditions. The engine nozzle includes a plurality of local flow conditioners placed in its inner surface in the final section for reducing the swirl of the engine exhaust flow at the exit of the engine nozzle.

Abstract: A computer-aided method suitable for calculating the position of a mobile surface of an object such an aircraft that moves through a fluid medium, which is affected by at least an upstream or downstream object component, for achieving a predetermined value Vo of a predetermined object performance target, including the following steps: preparing a computer-implemented CFD model of the object having said mobile surface in a first position; solving the CFD model and obtaining the value Vi of said object performance target; if the difference between Vi and Vo is greater than a predetermined value, modifying the CFD model changing the position of the mobile surface in the CFD model and iterating the solving step. The invention also refers to a system for carrying out the method.

Abstract: A computer-aided method for adapting a multi-block mesh topology of an object (11) to a modification in its geometry resulting from an operation defined in respect to some spatial directions, the method being used in the design of said object (11) by means of numerical simulation in structured meshes, comprising the following steps: a) providing the starting geometry (21) and mesh topology description (31); b) finding key points (25); c) finding the set of key vertexes placed at said key points (25); d) finding all the reference vertexes seeking for the vertexes connected to the key vertexes along said spatial directions; e) performing the geometrical operation and obtaining the adapted mesh topology moving said set of key vertexes to the position determined by the modified geometry (23) and the rest of vertexes proportionally to the displacement of the corresponding key vertex. The invention also refers to a system for carrying out said method.

Abstract: A computer-aided method suitable for calculating the position of a mobile surface of an object such an aircraft that moves through a fluid medium, which is affected by at least an upstream or downstream object component, for achieving a predetermined value Vo of a predetermined object performance target, comprising the following steps: preparing a computer-implemented CFD model of said object having said mobile surface in a first position; solving said CFD model and obtaining the value Vi of said object performance target; if the difference between Vi and Vo is greater than a predetermined value, modifying the CFD model changing the position of the mobile surface in the CFD model and iterating the solving step. The invention also refers to a system for carrying out said method.