The traditional dual time stepping formula is comparatively inefficient in solving unsteady problems due to its repeated transitional iteration stepping.In view of the characteristics of periodical unsteady flow,a high efficiency time spectral method based on discrete fourier transformation is hereby developed for such type of flow over an oscillating airfoil and wing.Roe's flux difference splitter scheme is utilized to discretize the convective terms of the time-space coupled Reynolds-averaged Navier-Stoke...