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Computational Modelling of Unsteady Airfoil Flows
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Numerical Method
- Finite-Volume approach with incompressible pressure-correction
scheme with full collocated grid
- TVD-MUSCL convection scheme,
- two different kinds of mesh (Figure 1):
a rotating one and
one with rotating airfoil and
static far-field boundary,
each in fine and coarse versions:
( fine: 482x72 = 34704, coarse: 400x60 = 24000 ),
coarse mesh in high/low-Re version.
Figure 1: philosophy of
remeshing
- second order time discretisation,
- first order space conservation law [2],
- deep stall cases are calculated with flexible time-stepping (Figure 2).
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Figure 2: non-universal time-stepping
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Turbulence Modelling
| Model |
Type |
Variables |
Formulation |
Reference |
| LLR |
2-eq. |
k-w |
low-Re |
Rung, T. 1996 |
| Wilcox |
2-eq. |
k-w |
low-Re |
Wilcox, D.C. 1988 |
| SA |
1-eq. |
vt |
low-Re |
Spalart, P.R., Allmaras, S.R. 1992 |
| SALSA |
1-eq. |
vt |
low-Re |
Rung, T. 1998 |
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Last modified: Thu Feb 10 10:27:44 CET 2000
