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

Mendez, Simon; Eldredge, Jeff D.

doi:10.1016/j.jcp.2009.03.026

Cited by 96 publications

(59 citation statements)

References 49 publications

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“…The inlet patch is instead placed closer to the wall and the bias flow is generated by a totally reflecting velocity inlet. Such a scheme is equivalent to that exploited by Mendez and Eldredge [5] and Andreini et al [6].…”

Section: Normal Wavementioning

confidence: 98%

“…In case of desired mean cross-flow, it is generated across the two patches with normal vector oriented in the X direction, called in the following X+ and X-. This domain definition enables to represent an infinite pattern of holes in both the stream and tangential direction and was already implemented for similar purposes in [5,31]. Surfaces Y + and Y −, with normal vector orthogonal to the eventual main flow, reproduce a simple in-line arrangement as better reported in Fig.2(a).…”

Section: Normal Wavementioning

confidence: 99%

“…Moreover experiments and other computational predictions generally perform such analysis investigating one frequency at the time [5], it is hence fundamental, to compare the responses of pure and multi-tonal signals in order to evaluate the effects of spurious forcing.…”

Section: Characteristic Boundary Conditionsmentioning

confidence: 99%

“…Despite the fact that simple numerical models to characterize those screens have been proposed [2][3][4] and successfully applied [1,5,6] also to relatively complex set-up under a wide range of flow condition, detailed CFD simulations [7][8][9] and large experimental campaigns [10][11][12][13] are more and more performed to increase the knowledge of the mechanisms ruling the phenomenon and expand the database of available geometries and flow conditions. Surprisingly the use of fully 3D computational technique did not push researchers to investigate more complex models including globally three dimensional flow and acoustic conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Surprisingly the use of fully 3D computational technique did not push researchers to investigate more complex models including globally three dimensional flow and acoustic conditions. Most of the reported works dealt with the basic set-up in which an orthogonally perforated plate with relatively low bias flow is reflecting a normally incident acoustic wave in absence of any mean flow in the liner itself [5,7,8]. This situation is however not fully realistic on actual combustor liners since perforations are usually inclined, the combustor is subjected to a mean flow and the main acoustic waves are travelling parallel to the plate.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

LES for the Evaluation of Acoustic Damping of Effusion Plates

Andreini

Bianchini

Facchini

et al. 2012

Volume 2: Combustion, Fuels and Emissions, Parts a and B

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Effusion cooled liners, commonly used in gas turbine combustion chambers to reduce wall temperature, may also help reducing the propagation of pressure fluctuations due to thermoacoustic instabilities.Large Eddy Simulations were conducted to accurately model the flow field and the acoustic response of effusion plates subject to a mean bias flow under external sinusoidal forcing. Even though existing lower order computational models showed good predicting capabilities, it is interesting to verify directly the influence of those parameters such as the staggered arrangement, the hole inclination, the presence of a grazing flow and the level of bias flow, which are not fully included in those models.A first bi-periodic single hole configuration with normal acoustic forcing was selected to investigate the acousting behavior with varying inclination angle, bias and grazing flow. 90 • and 30 • perforations were simulated for bias flow Mach number in the range 0.05-0.1 and grazing flow between 0 and 0.08. Those conditions were chosen to expand the knowledge of acoustic properties towards actual liners working conditions. A second more computationally expensive set-up, including 4 inclined holes at 30 • , focused on the damping of parallel to the plate waves.Details of the computational methods implemented in the general purpose open-source unstructured CFD code OpenFOAM R exploited to conduct this analysis are reported together with an analysis of the results obtained from the acoustic computations both regarding the flow field generated and the absorption and energy dissipation coefficient.

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Section: Normal Wavementioning

confidence: 98%

Section: Normal Wavementioning

confidence: 99%

Section: Characteristic Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

LES for the Evaluation of Acoustic Damping of Effusion Plates

Andreini

Bianchini

Facchini

et al. 2012

Volume 2: Combustion, Fuels and Emissions, Parts a and B

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Verdichterlärm

Joos¹

2020

Aerodynamik Axialer Turbokompressoren

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Large Eddy Simulation of a Motored Single-Cylinder Piston Engine: Numerical Strategies and Validation

Enaux

Granet

Vermorel

et al. 2010

Flow Turbulence Combust

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This paper describes a compressible Large Eddy Simulation (LES) used to investigate cyclic variations for nonreacting flow in an optical single cylinder engine setup. The simulated operating point is part of a large experimental database designed to validate LES for cycle-to-cycle prediction, and constitutes a first step towards the realization of fired operating points. The computational domain covers almost the whole experimental setup (intake and exhaust plenums, intake and exhaust ducts, cylinder) to account for acoustic phenomena. The assessment of the computation is performed in two regions of the domain: the intake and exhaust duct predictions are compared to the results of a Helmholtz solver and the experiment (pressure transducers and Particle Image Velocimetry (PIV)) while the in-cylinder dynamics are compared to PIV measurements. The ability of the B. Enaux · V. Granet (B) · O. Vermorel 154 Flow Turbulence Combust (2011) 86:153-177 developed methodology to capture the correct level of cycle-to-cycle variations is demonstrated considering in-cylinder pressure and velocity fields predictions. Cycleto-cycle variations in velocity are highlighted and localized using a proper orthogonal decomposition analysis.

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

Cited by 96 publications

References 49 publications

LES for the Evaluation of Acoustic Damping of Effusion Plates

LES for the Evaluation of Acoustic Damping of Effusion Plates

Verdichterlärm

Large Eddy Simulation of a Motored Single-Cylinder Piston Engine: Numerical Strategies and Validation

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