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Single and High-Lift Airfoil Design Optimization Using Aerodynamic Sensitivity Analysis
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- Authors
- Issue Date
- 2001-01
- Citation
- KSAS International Journal Vol.2 No.1, pp. 20-27
- Keywords
- 공학 ; sensitivity analysis ; turbulence model ; design variables ; Chimera grid
- Abstract
- Aerodynamic sensitiVIty analysis is performed for the Navier-Stokes equations
coupled with two-equation turbulence models using a discrete adjoint method and a
direct differentiation method respectively. Like the mean flow equations, the
turbulence model equations are also hand- differentiated to accurately calculate the
sensitivity derivatives of flow quantities with respect to design variables in
turbulent viscous flows. The sensitivity codes are then compared with the flow
solver in terms of solution accuracy, computing time and computer memory
requirements. The sensitivity derivatives obtained from the sensitivity codes with
different turbulence models are compared with each other. The capability of the
present sensitivity codes to treat complex geometry is successfully demonstrated by
analyzing the flows over multi-element airfoils on Chimera overlaid grid systems.
- Language
- English
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