Gust–Airfoil Coupling with a Loaded Airfoil

The unsteady load response of an airfoil encountering a gust is often modeled using analytical transfer functions, which assume idealized behavior both the flow and airfoil. One such function Sears function, models pure transverse interacting with flat-plate at zero mean incidence. was extended by Goldstein Atassi (“A Complete Second-Order Theory for Unsteady Flow About Airfoil due to Periodic Gust,” Journal Fluid Mechanics, Vol. 74, No. 4, 1976, pp. 741–765) account camber incidence, as well presence streamwise component. (“The Problem Lifting Revisited-New Results,” 141, April 1984, 109–122) showed that effects incidence (that is, nonzero loading) are not negligible when there In this work, new experimental data shown loading components. As giving validation model, physics behind model shown, including superposition onto potential field propagation along surface.