Nonlinear rotor aeroelastic analysis with stall and advanced wake dynamics


Journal Article

This paper studies an effective lag damping prediction method for a flexible flap-lag-torsional hingeless rotor model and correlation with the experimental data for a four-bladed rotor. The ONERA dynamic stall models of lift, drag, and pitching moment for each aerodynamic airfoil element and an advanced three-dimensional finite state wake model are used. The nonlinear equations of motion are represented in terms of state variables with 4 × 10 structural state variables. Eight aerodynamic elements for each rotor blade and at least eight wake harmonics are employed. The aerodynamic and wake state variables are 4 × 48 and 45, respectively. A numerical simulation technique is applied to determine the transient response of the hingeless rotor model and to predict the lag damping. Numerical investigations indicate that the present theoretical/numerical method improves the correlation of the theoretical and experimental results compared to an earlier eigenvalue, perturbation analysis.

Full Text

Duke Authors

Cited Authors

  • Tang, D; Dowell, EH

Published Date

  • January 1, 1997

Published In

Volume / Issue

  • 34 / 5

Start / End Page

  • 679 - 687

International Standard Serial Number (ISSN)

  • 0021-8669

Digital Object Identifier (DOI)

  • 10.2514/2.2229

Citation Source

  • Scopus