Rotor/Fuselage Unsteady Interactional Aerodynamics: A New Computational Model

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Date

1999-07-27

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Virginia Tech

Abstract

A new unsteady rotor/fuselage interactional aerodynamics model has been developed. This model loosely couples a Generalized Dynamic Wake Theory (GDWT) to a Navier-Stokes solution procedure. This coupling is achieved using a newly developed unsteady pressure jump boundary condition in the Navier-Stokes model. The new unsteady pressure jump boundary condition models each rotor blade as a moving pressure jump which travels around the rotor azimuth =and is applied between two adjacent planes in a cylindrical, non-rotating grid. Comparisons are made between predictions using this new model and experiments for an isolated rotor and for a coupled rotor/fuselage configuration.

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Keywords

Computational fluid dynamics, Rotorcraft, Aerodynamics, Unsteady Flow

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