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 by Academic Press, Inc.

Duke Scholars

Author Earl H. Dowell Thomas Lord Department of Mechanical Engineering and Materia ...