The present work aims to extend the capabilities of DUST, a mid-fidelity aerodynamic solver developed at Politecnico di Milano, for the aerodynamic simulation of flight conditions characterised by flow separations. With this aim, a novel numerical element was implemented in the solver obtained by a coupling between the potential unsteady vortex lattice method and viscous aerodynamic data of airfoil sections available from two-dimensional high-fidelity CFD simulations or experimental wind-tunnel tests. The paper describes the mathematical formulation of the method and the results of a comprehensive validation of the novel numerical element performed by comparison with both high-fidelity CFD simulations results and experimental data. In particular the validation test cases included the evaluation of the airloads of a fixed rigid wing, the flutter speed of a wedged wing and the aerodynamic performance of the full scale proprotor of the XV-15 tiltrotor operating in hover condition, forward flight in helicopter mode and airplane mode.

A Non-Linear Unsteady Vortex Lattice Method for Aeroelastic Rotor Loads Evaluation

Cocco, A.;Colli, A.;Savino, A.;Masarati, P.;Zanotti, A.
2022-01-01

Abstract

The present work aims to extend the capabilities of DUST, a mid-fidelity aerodynamic solver developed at Politecnico di Milano, for the aerodynamic simulation of flight conditions characterised by flow separations. With this aim, a novel numerical element was implemented in the solver obtained by a coupling between the potential unsteady vortex lattice method and viscous aerodynamic data of airfoil sections available from two-dimensional high-fidelity CFD simulations or experimental wind-tunnel tests. The paper describes the mathematical formulation of the method and the results of a comprehensive validation of the novel numerical element performed by comparison with both high-fidelity CFD simulations results and experimental data. In particular the validation test cases included the evaluation of the airloads of a fixed rigid wing, the flutter speed of a wedged wing and the aerodynamic performance of the full scale proprotor of the XV-15 tiltrotor operating in hover condition, forward flight in helicopter mode and airplane mode.
2022
48th European Rotorcraft Forum (ERF 2022)
9781713870296
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1220826
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