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Abstract
This paper presents an efficient and high fidelity aerodynamic interaction modeling method for effective simulation and analysis of compound rotorcraft as well as aircraft configured with multiple rotors. The methodology is the first-principle based viscous Vortex Particle Method (VPM) whose rotor wake modeling accuracy has been validated through extensive simulation. This research extends the modeling methodology to address modern multiple rotor systems and compound rotorcraft and emphasizes the mutual interaction between the rotors, wings, fuselage, and aerodynamic surfaces of a full rotorcraft. The developed methodology aims to provide an effective modeling tool to support the design and analysis of next generation vertical lift vehicles. In this paper, the mutual aerodynamic interaction between major components of modern rotorcraft configurations (such as the rotor/rotor, the rotor/wing, the rotor/propeller, the rotor/empennage, and interactions) and its impact on the vehicle performance is studied. The simulation results are compared with available measurements and a good correlation with the measurements is obtained for the representative cases evaluated.

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  Modeling the Aerodynamic Interaction of Multiple Rotor Vehicles and Compound Rotorcraft with Viscous Vortex Particle Method

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