Computations Of Viscous Fluid On Multi-element Airfoil With N-S Equations

The method of C-H-O type mixed grids is used to generate the multi-block structured grids automatically for multi-element airfoil in this thesis. Then the explicit finite-volume method for the two-dimensional steady Navier-Stocks equations is studied. In order to prevent odd-even decoupling of the solution and oscillations near the shock waves, artificial dissipation is added. Local time step, residue averaging, enthalpy damping and multi-grid method are used to accelerate the convergence during the five-step Runge-Kutta explicit time marching. The Balwin-Lomax algebra model and Spalart-Allmaras one-equation model are respectively adopted to simulate the turbulence. The comparison of computation results and experiment ones prove the above method to be ideal.