Table of Contents
ISRN Mechanical Engineering
Volume 2013, Article ID 127123, 4 pages
Research Article

Numerical Study of Flutter of a Two-Dimensional Aeroelastic System

Department of Mechanical Engineering, Atma Jaya Catholic University of Indonesia, Jakarta 12930, Indonesia

Received 15 April 2013; Accepted 14 May 2013

Academic Editors: Y.-H. Lin, Y. H. Park, and X. Yang

Copyright © 2013 Riccy Kurniawan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper deals with the problem of the aeroelastic stability of a typical aerofoil section with two degrees of freedom induced by the unsteady aerodynamic loads. A method is presented to model the unsteady lift and pitching moment acting on a two-dimensional typical aerofoil section, operating under attached flow conditions in an incompressible flow. Starting from suitable generalisations and approximations to aerodynamic indicial functions, the unsteady loads due to an arbitrary forcing are represented in a state-space form. From the resulting equations of motion, the flutter speed is computed through stability analysis of a linear state-space system.