| Autor: |
Matthias Schramm, Bernhard Stoevesandt, Joachim Peinke |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Computation, Vol 6, Iss 1, p 5 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2079-3197 |
| DOI: |
10.3390/computation6010005 |
| Popis: |
The adjoint approach in gradient-based optimization combined with computational fluid dynamics is commonly applied in various engineering fields. In this work, the gradients are used for the design of a two-dimensional airfoil shape, where the aim is a change in lift and drag coefficient, respectively, to a given target value. The optimizations use the unconstrained quasi-Newton method with an approximation of the Hessian. The flow field is computed with a finite-volume solver where the continuous adjoint approach is implemented. A common assumption in this approach is the use of the same turbulent viscosity in the adjoint diffusion term as for the primal flow field. The effect of this so-called “frozen turbulence” assumption is compared to the results using adjoints to the Spalart–Allmaras turbulence model. The comparison is done at a Reynolds number of R e = 2 × 10 6 for two different airfoils at different angles of attack. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
