A preliminary-design prediction and analysis capability applicable to vehicles in unsteady maneuvers involving nonlinear, time-dependent flow conditions is described. The approach is a direct coupling of fluid dynamics and flight mechanics for use in the flight regimes where the flow phenomena are dominated by vorticity and separation associated with high angles of attack and rapid motions. The modularized computer algorithm is based on mathematical flow models, supplemented by empirical information where necessary, which accurately represent the physics of complex flows. This physics-based method is applicable to generic configurations, it is not dependent on specific empirical information, and it is economical to use. The resulting method can be used as a prediction capability for specified vehicle motions or flow conditions, or it can be coupled with a six-degree-of-freedom equation-of-motion solver to predict flight trajectories and transient performance characteristics.
An unsteady vortex wake model for maneuvering vehicles
Instationäres Wirbelnachlaufmodell für manövrierende Luftfahrzeuge
1996
12 Seiten, 17 Bilder, 15 Quellen
Aufsatz (Konferenz)
Englisch
An Unsteady Vortex Wake Model for Maneuvering Vehicles
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