Linearization and Analytical Aerodynamic Sensitivity of Unsteady Vortex-Lattice Aerodynamics

Huang, Yanxin; Su, Weihua

doi:10.2514/6.2019-1215

Cited by 1 publication

(1 citation statement)

References 19 publications

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“…Vortex Lattice has the advantage to be capable of modeling the aircraft undergoing large translations and rotations and has become a popular method in aeroelastic frameworks for the simulation of VFA (38,20,44,45,46,47,48,49,50) . Also, for conditions within the limitations and assumptions considered in its formulation, Vortex Lattice results demonstrate remarkable agreement with CFD and experimental data (51,52,53) .…”

Section: Lifting Surfaces Aerodynamicsmentioning

confidence: 99%

Propeller influence on the aeroelastic stability of High Altitude Long Endurance aircraft

Teixeira

Cesnik

2020

Aeronaut. j.

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This work investigates the propeller’s influence on the stability of High Altitude Long Endurance aircraft, incorporating all resultant loads at the propeller hub, propeller slipstream, and gyroscopic loads. Such effects are usually neglected in the aeroelastic simulation of HALE aircraft. For that goal, a previously developed framework, which couples a geometrically nonlinear structural solver with an Unsteady Vortex Lattice method (uVLM) for lifting surfaces and a Viscous Vortex Particle (VVP) method for propeller slipstream, was employed to generate time-data series. Also, a method, based on a combination of Proper Orthogonal Decomposition and system identification, to extract dynamic information (frequencies, damping, and modes) of the aircraft from a time-series signal is proposed and successfully tested for a purely structural case, for which reference data is available. The method is then applied to investigate the stability of aeroelastic cases. The results demonstrate that the presence of propellers can influence the aeroelastic stability of a Very Flexible Aircraft.

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