Development of High-Order Taylor–Galerkin Schemes for LES

Colin, Olivier; Rudgyard, Michael

doi:10.1006/jcph.2000.6538

Cited by 401 publications

(262 citation statements)

References 20 publications

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“…An homogeneous methane-air mixture at equivalence ratio φ = 0.95 and temperature T 1 = 300 K is fed through the inlet duct atū 1 The numerical solver used for the computation of the Flame Transfer Functions and the unsteady simulations is AVBP. A highorder fully explicit scheme is used to advance the compressible reacting Navier-Stokes equations [25]. Chemistry is modeled using a two-step chemical scheme for methane-air flames, yielding a laminar flame speed S L = 0.41 m/s, and the thickened flame model [26] with a flame thickening factor of 2 for computational cost issues.…”

Section: Numerical Setupmentioning

confidence: 99%

DNS of Intrinsic ThermoAcoustic modes in laminar premixed flames

Courtine

Selle

Poinsot

2015

Combustion and Flame

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. , Emmert et al. 2015 suggest that thermoacoustic modes can appear in combustors with anechoic terminations, which have no acoustic eigenmodes. These modes, called here Intrinsic ThermoAcoustic (ITA), can be predicted with simple theoretical arguments, but have been ignored for a long time. They are reproduced in this paper using Direct Numerical Simulation (DNS) of a laminar premixed Bunsen type flame. DNS results and theory are compared showing very good agreement in terms of both frequency and mode structure. DNS confirms that the frequency of ITA modes does not depend on any acoustic characteristic of the burner. Based on a numerical evaluation of the Flame Transfer Function, stability limits of ITA modes predicted by theory are also recovered in the DNS with reasonable accuracy. Finally, DNS is used to analyze the mechanisms of ITA modes.

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Section: Numerical Setupmentioning

confidence: 99%

DNS of Intrinsic ThermoAcoustic modes in laminar premixed flames

Courtine

Selle

Poinsot

2015

Combustion and Flame

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“…AVBP is dedicated to Large-Eddy Simulations and Direct Numerical Simulations and has been widely used and validated in the past years in all kinds of configurations (Schönfeld and Rudgyard, 1999;Moureau et al, 2005;Schmitt et al, 2007;Prière et al, 2004;Roux et al, 2008;Mendez and Nicoud, 2008b). The numerical scheme is the TTGC (Twostep Taylor Galerkin C) scheme (Colin and Rudgyard, 2000): this essentially non dissipative scheme was specifically developed to handle unsteady turbulent flows with unstructured meshes. It is third order accurate in both space and time.…”

Section: The Les Codementioning

confidence: 99%

“…LES are performed using AVBP, with the TTGC scheme (Colin and Rudgyard, 2000). The subgrid model is a classical Smagorinsky model (Smagorinsky, 1963).…”

Section: Configuration Of Interestmentioning

confidence: 99%

Acoustic modeling of perforated plates with bias flow for Large-Eddy Simulations

Mendez

Eldredge

2009

Journal of Computational Physics

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The study of the acoustic effect of perforated plates by Large-Eddy Simulations is reported. The ability of compressible Large-Eddy Simulations to provide data on the flow around a perforated plate and the associated acoustic damping is demonstrated. In particular, assumptions of existing models of the acoustic effect of perforated plate are assessed thanks to the Large-Eddy Simulations results. The question of modeling the effect of perforated plates is then addressed in the context of thermoacoustic instabilities of gas turbine combustion chambers. Details are provided about the implementation, validation and application of a homogeneous boundary condition modeling the acoustic effect of perforated plates for compressible Large-Eddy Simulations of the flow in combustions chambers cooled by full-coverage film cooling.

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“…The minimal thickening factor for TFLES is then: F min = n∆ x /δ 0 r . For instance, present results show that flame simulations performed with AVBP using the third order TTGC numerical scheme [30] without artificial viscosity require n = 3.…”

Section: Comparison Of Filtered and Thickened Flamesmentioning

confidence: 78%