Abstract
In order to understand the unusual flutter phenomenon observed in experimental transonic flow for a high-aspect-ratio forwardswept wing, numerical simulations have been conducted using a 3D Navier-Stokes code. The simulations have confirmed that the flutter is a single-degree-of-freedom flutter of the first bending mode in which shock-induced flow separation plays a dominant role. The simulations have also clarified the detailed effects of Mach number and dynamic pressure (particularly the mass ratio) on this type of flutter.
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