Study of Various Aerodynamic Theories for Flutter Prediction for an Airfoil in Incompressible Flow

The present work involves the prediction of flutter using different aerodynamic models. The results of four aerodynamic models, viz., steady, quasi-steady, simplified quasi-unsteady, and simplified unsteady, are compared using linear aeroelastic models for a wide range of non-dimensional flutter parameters. The result of the flutter analysis performed using p and p-k methods is verified with experimental results available in the literature. Aerodynamic models considered in the study pose different aerodynamic dampings, which affects the accuracy of p-k method in predicting flutter boundary. The present work aims to bring a quantitative comparison between the results of the p-k method as well as the p method in combination with different aerodynamic theories for a broad range of parameters.