Method and system for a quick calculation of aerodynamic...

G - Physics – 06 – F

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G06F 17/50 (2006.01)

Patent

CA 2709642

A computer-aided method suitable for assisting in the design of an aircraft by providing the dimensioning aerodynamic forces and other relevant values comprising the following steps: a) Selecting a set of parameters of the aircraft, being said aerodynamic forces and other relevant values dependant of said parameters; b) Performing flow field CFD RANS computations for a number N1 of different combination of values of said parameters; c) Obtaining said aerodynamic forces and other relevant values for whatever combination of values of said parameters through a reduced-order model, generated by computing the POD modes of the flow variables, expanding the flow variables using said POD modes and obtaining the POD coefficients of said expanded flow variables using a genetic algorithm that minimizes the error associated to the expansion of the Navier-Stokes equations. The invention also refers to a system for carrying out said method.

L'invention concerne un procédé assisté par ordinateur adapté pour faciliter la conception d'un avion en fournissant les forces aérodynamiques de dimensionnement et d'autres valeurs pertinentes, comprenant les étapes consistant à : a) sélectionner un ensemble de paramètres de l'avion, lesdites forces aérodynamiques et d'autres valeurs pertinentes étant dépendantes desdits paramètres; b) effectuer des calculs RANS CFD de champ de flux pour un nombre N1 de combinaisons différentes de valeurs desdits paramètres; c) obtenir lesdites forces aérodynamiques et autres valeurs pertinentes pour n'importe quelle combinaison de valeurs desdits paramètres par l'intermédiaire d'un modèle d'ordre réduit, généré en calculant les modes POD des variables de flux, développer les variables de flux à l'aide desdits modes POD et obtenir les coefficients POD desdites variables de flux développées en utilisant un algorithme génétique qui minimise l'erreur associée au développement des équations de Navier-Stokes. L'invention concerne également un système pour exécuter ledit procédé.

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