CFD Practice : Modeling External Compressible Flow

thu,2010-11-02

I learnt how to set up and solve an external aerodynamics problem using the pressure-based coupled solver and Spalart-Allamaras turbulence model.
It showed how to monitors, and demonstrated the use of several postprocessing tools to examine the flow phenomena associated with shock wave.

Given Problem :

The problems considers the flow around an airfoil at an angle of attack α=4 degree and a free stream Mach number of 0.8 . The flow is transonic, has a fairly strong shock near the mid-chord (x/c=0.45) on the upper (suction) side . The chord length is 1 m.


Figure

Calculation graph :


Scaled Residuals


Converge History of Velocity


Drag Convergence History


Lift Convergence History

Velocity Vectors Colored by Velocity Magnitude (m/s)