Comparison of Two Large–Eddy Simulations for a Stalled Airfoil Flow Using Different Finite–Volume Formulations
Publication date
2004
Document type
Book part
Author
Organisational unit
Series or journal
Notes on Numerical Fluid Mechanics and Multi- disciplinary Design
Periodical volume
86
Book title
Recent Results in Laminar-Turbulent Transition
First page
293
Last page
306
Peer-reviewed
✅
Part of the university bibliography
Nein
Abstract
In the present paper a comparison of two different LES predictions was carried out for the flow around an unswept wing with leading-edge stall. The configuration is associated with the COSTWING initiative in which the flow around a NACA-4415 airfoil is studied experimentally for the high-lift case and beyond. As a first step towards the investigation of separated turbulent flows, simulations based on two different LES codes were performed for a fixed set of parameters defined by a low Reynolds number Re c = 20,000 and a high angle of attack α = 18°. Both are second-order accurate finitevolume methods but differ with respect to the grid configurations applied. The first is written for arbitrary non-orthogonal (colocated) block-structured grids (LESOCC), whereas the second uses a non-uniform Cartesian (staggered) grid arrangement with a special interpolation technique near curvilinear boundaries (MGLET). The predicted results are compared in detail considering the averaged flow field, several important integral parameters, and finally higher-order statistics. At large a very good agreement of both LES data is found. Smaller deviations occurring especially with respect to higher-order moments are discussed and evaluated.
Cite as
Jovičić, N., Evans, G., Breuer, M., Friedrich, R. (2004). Comparison of Two Large-Eddy Simulations for a Stalled Airfoil Flow Using Different Finite-Volume Formulations. In: Wagner, S., Kloker, M., Rist, U. (eds) Recent Results in Laminar-Turbulent Transition. Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM), vol 86. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45060-3_23
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