Abstract

The paper reports an extension of the double linearization theory to study effects of mean angle of attack, camber and thickness on flutter of a rotating subsonic annular cascade of blades. Numerical results compared with the strip theory prediction are presented to demonstrate some features of three-dimensional effects. It is found that the three-dimensional effect is essentially important. The strip theory approximation overestimates the spanwise variation of aerodynamic forces on vibrating blades, and in some cases, underestimates the overall aerodynamic work due to the mean loading.

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