A Numerical Study of Transonic Buffet on a Supercritical Airfoil
نویسندگان
چکیده
The steady/unsteady flow of the BGK No. 1 supercritical airfoil is investigated by the solution of the Reynolds-Averaged Navier-Stokes equations with a two-equation k-ω turbulence model. The dual-time stepping method is used to march in time. Two steady cases ( 71 . 0 = Ma , 396 . 1 = α and 71 . 0 = Ma , 0 . 9 = α ) and one unsteady case ( 71 . 0 = Ma , 97 . 6 = α ), both with a far-stream 6 10 20 Re x = , are computed. The results are compared with experimental data obtained by Lee et al. The mechanism of the self-excited oscillation for supercritical airfoils is explored. The oscillation period calculated based on the mechanism proposed by Lee is consistent with the Fourier analysis of the computed lift coefficient.
منابع مشابه
Numerical Study of Transonic Buffet on a Supercritical Airfoil
The flow of the Bauer–Garabedian–Korn (BGK) No. 1 supercritical airfoil is investigated by the solution of the unsteady Reynolds-averaged Navier–Stokes equations with a two-equation lagged k–ω turbulent model. Two steady cases (M = 0.71, α= 1.396 deg and M = 0.71, α= 9.0 deg) and one unsteady case (M = 0.71, α= 6.97 deg), all with a far-stream Reynolds number of 20 × 106, are computed. The resu...
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