Simulation of unsteady turbulent flows around moving aerofoils using the pseudo-time method
✍ Scribed by K. J. Badcock; F. Cantariti; I. Hawkins; M. Woodgate; L. Dubuc; B. E. Richards
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 275 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0271-2091
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✦ Synopsis
The pseudo-time formulation of Jameson has facilitated the use of numerical methods for unsteady flows, these methods have proved successful for steady flows. The formulation uses iterations through pseudo-time to arrive at the next real time approximation. This iteration can be used in a straightforward manner to remove sequencing errors introduced when solving mean flow equations together with another set of differential equations (e.g. two-equation turbulence models or structural equations). The current paper discusses the accuracy and efficiency advantages of removing the sequencing error and the effect that building extra equations into the pseudo-time iteration has on its convergence characteristics. Test cases used are for the turbulent flow around pitching and ramping aerofoils. The performance of an implicit method for solving the pseudo-steady state problem is also assessed.