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A Space-Time Accurate Finite-State Inflow Model for Aeroelastic Applications

Massimo Gennaretti, Riccardo Gori, Felice Cardito, Jacopo Serafini, Giovanni Bernardini, Roma Tre University

May 17, 2016

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A Space-Time Accurate Finite-State Inflow Model for Aeroelastic Applications

  • Presented at Forum 72
  • 8 pages
  • SKU # : 72-2016-222
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A Space-Time Accurate Finite-State Inflow Model for Aeroelastic Applications

Authors / Details: Massimo Gennaretti, Riccardo Gori, Felice Cardito, Jacopo Serafini, Giovanni Bernardini, Roma Tre University

Abstract
Dynamic wake inflow modelling is one of the main issues in the development of efficient and high-fidelity simulation tools for design of new generation rotorcraft. The aim of this paper is the development of a LTI, space-accurate, finitestate model for the prediction of dynamic wake inflow perturbations of helicopter rotors in arbitrary steady flight, extracted from high-fidelity aerodynamics solvers. The proposed dynamic wake inflow model, coupled with sectional aerodynamic load theories, may be conveniently applied for aeroelastic and aero-servo-elastic analysis of rotors with the introduction of a limited number of additional states, thus turning out to be suitable for real-time predictions. The outcomes of numerical investigations concerning a helicopter rotor in hovering and forward flight conditions are shown to demonstrate the capability of the introduced model to capture with a good level of accuracy the time evolution of the wake inflow radial distribution on blades of rotors subject to arbitrary perturbations.

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