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Direct Numerical Simulation of Boundary-Layer Receptivity for Subsonic Flow Around Airfoil

  • Li Jiang
  • Hua Shan
  • Chaoqun Liu
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 54)

Abstract

Direct numerical simulation is used to study leading edge receptivity to free-stream disturbance. The full compressible Navier-Stokes equations in generalized curvilinear coordinates are solved by LU-SGS implicit scheme, which requires no tridiagonal inversion and is capable of being completely vectorized and parallelized. A fourth-order centered compact scheme is used for spatial derivatives and second-order Euler Backward scheme is applied for temporal discretization. A sixth-order implicit filter is employed to reduce the numerical oscillation. The non-reflecting boundary conditions are imposed at the far-field and outflow boundaries to avoid possible non-physical wave reflection. The code is developed in a form of total flow and no base flow with perturbation assumption is needed. The code also does not need buffer or sponge domain for DNS. The leading-edge receptivities of the compressible boundary-layer over the flat plate and the Joukowsky airfoil to free-stream disturbances are simulated.

Keywords

Direct Numerical Simulation Instability Wave Outflow Boundary Linear Stability Theory Disturbance Velocity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • Li Jiang
    • 1
  • Hua Shan
    • 1
  • Chaoqun Liu
    • 1
  1. 1.Center for Numerical Simulation and ModelingLouisiana Tech UniversityRustonUSA

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