STALL FLUTTER AND NONLINEAR DIVERGENCE OF A TWO-DIMENSIONAL FLAT PLATE WING

摘要

An experimental investigation is made of the stall flutter and nonlinear divergence characteristics of a two-dimensional flat-plate wing, pivoted about the mid-chord. The only nonlinearity present was aerodynamic. Measurements were taken of static moments, flutter amplitudes, centershifts, frequencies, abd decay-growth rates for various initial angle-of-attack settings, and compared with linear theory and quasistatic theory. Nonlinear divergence was also observed and resulting static equilibrium positions were obtained. Free rotation tests of the wing were also conducted. (Modified author abstract)