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Aerospace Engineering pres.

AE Dissertation Defense: "Propeller Effects on Very Flexible Aircraft"

Patricia Teixeira

XHALE Clamped and Particles XHALE Clamped and Particles
XHALE Clamped and Particles
Although many studies have been done in propeller-wing interaction, little has been explored about propeller effects on very flexible aircraft (VFA). Moreover, state-of-the-art nonlinear aeroelastic frameworks lack complete propeller modeling, just using simple concentrated forces to model its thrust.

This work aims to fill this gap by incorporating propeller aerodynamics and inertial effects into an aeroelastic framework. For that, the University of Michigan’s Nonlinear Aeroelastic Simulation Toolbox (UM/NAST) is enhanced with an Unsteady Vortex Lattice for the lifting surfaces and a Lifting Line coupled with Viscous Vortex Particle (LL/VVP) method to model the propeller aerodynamics. In addition, inertia effects associated with the rigid rotating blades are modeled. Verification tests demonstrate the accuracy of each new component added to the enhanced framework.

Using the new developments, investigations of propeller effects on the aeroelastic response and stability of a representative High Altitude Long Endurance (HALE) aircraft were performed. The results demonstrate that the presence of propellers can influence the aeroelastic response and stability of a VFA. Therefore, the additional propeller effects (besides just the incorporation of thrust) should not be neglected in aeroelastic simulations.
XHALE Clamped and Particles XHALE Clamped and Particles
XHALE Clamped and Particles
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