Abstract:

By sub-iterative synchronous solution of fluid dynamics equations and rigid-body dynamics equations, a coupling numerical method is proposed to explore the unsteady movement characteristics of aero-craft and to study the unsteady multi-freedom connected movements about a slender delta-wing. It is shown that the motion develops gradually to a self-maintained stable limit-cycle-oscillation after the flow structure becomes unstable. The roll moment curve in one cycle takes on a typical stable “double 8” form.

Key words:  , CFD,  , wing , rock,  , sub-iterative,  , limit , cycle,  , coupling , motion