Abstract
Recent developments in large scale computer architectures allow Large Eddy Simulation (LES) to be considered for the prediction of turbulent reacting flows in geometries encountered in industry. To do so, various difficulties must be overcome and the first one is to ensure that proper meshes can be used for LES. Indeed, the quality of meshes is known to be a critical factor in LES of reacting flows. This issue becomes even more crucial when LES is used to compute large configurations such as full annular combustion chambers. Various analysis of mesh effects on LES results have been published before but all are limited to single-sector computational domains. However, real annular gas-turbine engines contain ten to twenty of such sectors and LES must also be used in such full chambers for the study of ignition or azimuthal thermo-acoustic interactions. Instabilities (mostly azimuthal modes involving the full annular geometry) remain a critical issue to aeronautical or power-generation industries and LES seems to be a promising path to properly apprehend such complex unsteady couplings. Based on these observations, mesh effects on LES in a full annular gas-turbine combustion chamber (including its casing) is studied here in the context of its azimuthal thermo-acoustic response. To do so, a fully compressible, multi-species reacting LES is used on two meshes yielding two fully unsteady turbulent reacting predictions of the same configuration. The two tetrahedra meshes contain respectively 38 and 93 millions cells. Limit-cycles as obtained by the two LES are gauged against each other for various flow quantities such as mean velocity profiles, flame position and temperature fields. The thermo-acoustic limit-cycles are observed to be relatively indepedent of the grid resolution which comforts the use of LES tools to provide insights and understanding of the mechanisms triggering the coupling between the system acoustic eigenmodes and combustion.
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References
T. Poinsot and D. Veynante. Theoretical and Numerical Combustion. R.T. Edwards, 2nd edition, 2005.
F. Di Mare, W. P. Jones, and K. Menzies. Large eddy simulation of a model gas turbine combustor. Combustion and Flame, 137:278–295, 2004.
H. Pitsch. Large eddy simulation of turbulent combustion. Annual Review of Fluid Mechanics, 38:453–482, 2006.
A. Sengissen, J. F. Van Kampen, R. Huls, G. Stoffels, J. B. W. Kok, and T. Poinsot. Les and experimental studies of cold and reacting flows in a swirled partially premixed burner with and without fuel modulation. Combustion and Flame, 150:40–53, 2007.
C. Martin, L. Benoit, Y. Sommerer, F. Nicoud, and T. Poinsot. Les and acoustic analysis of combustion instability in a staged turbulent swirled combustor. AIAA Journal, 44(4):741–750, 2006.
G. Boudier, N. Lamarque, G. Staffelbach, L.Y.M. Gicquel, and T. Poinsot. Thermo-acoustic stability of a helicopter gas turbine combustor using large-eddy simulations. Int. Journal Aeroacoustics, 8(1):69–94, 2009.
M. Boileau, G. Staffelbach, B. Cuenot, T. Poinsot, and C. Bérat. LES of an ignition sequence in a gas turbine engine. Combustion and Flame, 154(1-2):2–22, 2008.
G. Staffelbach, L.Y.M. Gicquel, G. Boudier, and T. Poinsot. Large eddy simulation of self-excited azimuthal modes in annular combustors. Proceedings of the Combustion Institute, 32:2909–2916, 2009.
P. Wolf, G. Staffelbach, A. Roux, L. Gicquel, T. Poinsot, and V. Moureau. Massively parallel LES of azimuthal thermo-acoustic instabilities in annular gas turbines. C. R. Mecanique, (in press), 2009.
P. Sagaut. Large eddy simulation for incompressible flows. Springer, 2002.
S. B. Pope. Ten questions concerning the large-eddy simulation of turbulent flows. New Journal of Physics, 6:35, 2004.
B. Vreman, B. Geurts, and H. Kuerten. Comparison of numerical schemes in large-eddy simulation of the temporal mixing layer. International Journal for Numerical Methods in Fluids, 22:297–311, 1996.
J. Meyers, B. J. Geurts, and M. Baelmans. Database analysis of errors in large-eddy simulation. Physics of Fluids, 15(9):2740–2755, September 2003.
G. Boudier, L. Y. M. Gicquel, T. Poinsot, D. Bissières, and C. Bérat. Effect of mesh resolution on large eddy simulation of reacting flows in complex geometry combustors. Combustion and Flame, 155(1-2):196–214, 2008.
O. Colin and M. Rudgyard. Development of high-order taylor-galerkin schemes for unsteady calculations. Journal of Computational Physics, 162(2):338–371, 2000.
J. Smagorinsky. General circulation experiments with the primitive equations: 1. the basic experiment. Monthly Weather Review, 91:99–164, 1963.
T. Poinsot and S. Lele. Boundary conditions for direct simulations of compressible viscous flows. Journal of Computational Physics, 101(1):104–129, 1992.
O. Colin, F. Ducros, D. Veynante, and T. Poinsot. A thickened flame model for large eddy simulations of turbulent premixed combustion. Physics of Fluids, 12(7):1843–1863, 2000.
S. Mendez and F. Nicoud. Adiabatic homogeneous model for flow around a multiperforated plate. American Institute of Aeronautics and Astronautics Journal, 46(10):2623–2633, 2008.
S. Ghosal and P. Moin. The basic equations for the large eddy simulation of turbulent flows in complex geometry. Journal of Computational Physics, 118:24–37, 1995.
J.-M. Senoner, M. García, S. Mendez, G. Staffelbach, O. Vermorel, and T. Poinsot. Growth of Rounding Errors and Repetitivity of Large-Eddy Simulations. AIAA Journal, 46(7):1773–1781, 2008.
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Wolf, P., Gicquel, L.Y.M., Staffelbach, G., Poinsot, T. (2011). Grid Effects on LES Thermo-Acoustic Limit-Cycle of a Full Annular Aeronautical Engine. In: Salvetti, M., Geurts, B., Meyers, J., Sagaut, P. (eds) Quality and Reliability of Large-Eddy Simulations II. ERCOFTAC Series, vol 16. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0231-8_22
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DOI: https://doi.org/10.1007/978-94-007-0231-8_22
Publisher Name: Springer, Dordrecht
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