Prediction of loaded airfoil unsteady aerodynamic gust response by a locally analytical method

Abstract

A complete first order model is formulated to analyze the effects of steady loading on the incompressible unsteady aerodynamics generated by a two-dimensional gust convected with the steady mean flow past an arbitrary airfoil at finite nonzero angle of attack. A locally analytical solution is developed in which the discrete algebraic equations which represent the flow field equations are obtained from analytical solutions in individual grid elements. This model and locally analytical solution are then applied to a series of airfoil and flow configurations.