Numerical studies on an active flow circulation controlled flap concept for aeronautical applications

Athanasios Zacharos, Konstantinos Kontis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Four different circulation controlled airfoils have been numerically simulated. The baseline airfoil was a 17% thick supercritical airfoil. Different blowing rates have been examined by adjusting the slot height and blowing velocity. A number of turbulence models were employed, these were: Spalart-Allmaras, standard κ-ε, realizable κ-ε, SST κ-ω and Reynolds stress model. The results from the numerical simulations were compared with experimental data at zero angle of attack. The solutions indicated that at momentum coefficients, Cμ = 0.1 or greater, all isotropic turbulence models failed to capture the physics of the circulation control problem. The Reynolds stress model captured successfully the physics at Cμ, = 0.1. At greater values of momentum coefficient, the Reynolds stress model also failed to predict the experimentally measured lift coefficients because the jet remained attached to the surface of the airfoil. The Spalart-Allmaras model consistently predicted the right trend for lift variation with Cμ in all cases tested. © 2006 The Japan Society for Aeronautical and Space Sciences.
    Original languageEnglish
    Pages (from-to)25-30
    Number of pages5
    JournalTransactions of the Japan Society for Aeronautical and Space Sciences
    Volume49
    Issue number163
    DOIs
    Publication statusPublished - 2006

    Keywords

    • Aerodynamics
    • CFD
    • Circulation control

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