Modeling and Flight Dynamics Analysis of Rotor-on-Wing Interference Effects of a Winged Single Main Rotor

Publication Date

1-1-2023

Document Type

Conference Proceeding

Publication Title

FORUM 2023 - Vertical Flight Society 79th Annual Forum and Technology Display

Abstract

The U.S. Army is considering a single main rotor helicopter with a wing for Future Vertical Lift (FVL) Capability Set 1 (CS-1). Previous work has been done to design a blade element flight dynamics model of a generic winged single main rotor helicopter. To increase the fidelity of the model, a rotor-on-wing interference model was developed to determine how the interference impacts trim and flight dynamics of the winged single main rotor configuration throughout the flight envelope. The model leverages preexisting models to determine the rotor wake location and radius as well as the download on the wing at low speeds. Once the wake moves off of the wing, the model applies download observed in CFD, wind tunnel tests, and flight tests to both wings. Finally, differential lift is applied to the wing as the reverse flow region forms. The differences in trim and flight dynamics of the rotor-on-wing interference model compared to the no interference model at different wing locations and lift share ratios are important to understand when designing control systems, power required for trim and dynamic maneuvers, and actuator throw. It was found that the control system designed for the generic winged single main rotor does not need to be adjusted for rotor-on-wing interference. Therefore rotor-on-wing interference models that focus on trim are sufficient.

Department

Research Foundation

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