Semi-Empirical Model for Prediction of Unsteady Forces on an Airfoil with Application to Flutter

A semi-empirical model is described for predicting unsteady aerodynamic forces on arbitrary airfoils under mildly stalled and unstalled conditions. Aerodynamic forces are modelled using second-order ordinary differential equations for lift and moment with airfoil motion as the input. This model is simultaneously integrated with structural dynamics. Results for a number of cases are presented to demonstrate the suitability of this model to predict flutter, Comparison is made to the flutter characteristics determined by a Navier-Stokes solver also the classical incompressible potential flow theory. © 1993 Academic Press. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Mahajan, AJ; Kaza, KRV; Dowell, EH

Published Date

  • 1993

Published In

Volume / Issue

  • 7 / 1

Start / End Page

  • 87 - 103

International Standard Serial Number (ISSN)

  • 0889-9746

Digital Object Identifier (DOI)

  • 10.1006/jfls.1993.1007