Flux-corrected dispersion-improved CABARET schemes for linear and nonlinear wave propagation problems

Chintagunta, Abhishek; Naghibi, S. Elnaz; Karabasov, Sergey A.

doi:10.1016/j.compfluid.2017.08.018

Cited by 28 publications

(7 citation statements)

References 27 publications

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“…The generality of the acoustic length and time scale coefficients have been discussed and demonstrated in [21] for the single-stream isothermal jets and the idea in the context is to use the set of coefficients obtained for cold SILOET jet from [21] in the calculation of the acoustic spectra for Ma = 0.6 and Ma = 0.8 jets. In a similar fashion, the dimensionless coefficients ijkl C used in the model (8) were previously computed from analysing the LES solution of cold SILOET jet [21].…”

Section: Ivacoustic Modeling Methodsmentioning

confidence: 99%

“…Due to advances in highresolution algorithms and computer architectures, Large Eddy Simulations (LES) have become increasingly popular for high-resolution jet flow and noise calculations. In our previous works, we developed a high-resolution Large Eddy Simulations solver based on the Compact Accurately Boundary-Adjusting high-REsolution Technique (CABARET) method [6][7][8]. CABARET is a shock-capturing scheme with improved dissipation and dispersion properties and implemented with asynchronous time stepping [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flow and Noise Predictions of the Isolated Subsonic Jets from the Doak Laboratory Experiment

Gryazev

Markesteijn

Karabasov

et al. 2022

28th AIAA/CEAS Aeroacoustics 2022 Conference

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Flow and noise solutions using Large Eddy Simulation (LES) are evaluated for two jets at acoustic Mach numbers 0.6 and 0.8. The jets correspond to Doak Laboratory Experiment performed at the University of Southampton. LES method is based on the Compact Accurately Boundary-Adjusting High-Resolution Technique (CABARET) scheme and is implemented on Graphics Processing Units. In comparison with many other jet noise benchmarks, the Doak jet cases include well-defined boundary conditions corresponding to the meanflow velocity and turbulent intensity profiles measured just downstream of the nozzle exit. The far-field noise predictions are obtained using two approaches. First, the LES solutions are coupled with the penetrable surface formation of the Ffowcs Williams-Hawkings method. The second approach is based on the reducedorder implementation of the Generalised Acoustic Analogy model for which time averaged quantities are obtained from the LES solutions. All numerical solutions are compared with the flow and acoustic microphone measurements from the Doak experiment. The results are cross-validated using the sJet code, which corresponds to an empirical model obtained from interpolations over a large set of NASA jet noise data.

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Section: Ivacoustic Modeling Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flow and Noise Predictions of the Isolated Subsonic Jets from the Doak Laboratory Experiment

Gryazev

Markesteijn

Karabasov

et al. 2022

28th AIAA/CEAS Aeroacoustics 2022 Conference

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“…There are three types of noise sources which can be identified in (13) For an axi-symmetric meanflow, the 3D integral can be further decomposed into a series of two-dimensional azimuthal modes…”

Section: Formulation Based On the Volume Integral Approachmentioning

confidence: 99%

A volume integral implementation of the Goldstein generalised acoustic analogy for unsteady flow simulations

Semiletov

Karabasov

2018

J. Fluid Mech.

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A new volume integral method based on the Goldstein generalised acoustic analogy is developed and directly applied with large-eddy simulation (LES). In comparison with the existing Goldstein generalised acoustic analogy implementations, the current method does not require the computation and recording of the expensive fluctuating stress autocovariance function in the seven-dimensional space–time. Until now, the multidimensional complexity of the generalised acoustic analogy source term has been the main barrier to using it in routine engineering calculations. The new method only requires local pointwise stresses as an input that can be routinely computed during the flow simulation. On the other hand, the new method is mathematically equivalent to the original Goldstein acoustic analogy formulation, and, thus, allows for a direct correspondence between different effective noise sources in the jet and the far-field noise spectra. The implementation is performed for conditions of a high-speed subsonic isothermal jet corresponding to the Rolls-Royce SILOET experiment and uses the LES solution based on the CABARET solver. The flow and noise solutions are validated by comparison with experiment. The accuracy and robustness of the integral volume implementation of the generalised acoustic analogy are compared with those based on the standard Ffowcs Williams–Hawkings surface integral method and the conventional Lighthill acoustic analogy. As a demonstration of its capabilities to investigate jet noise mechanisms, the new integral volume method is applied to analyse the relative importance of various noise generation and propagation components within the Goldstein generalised acoustic analogy model.

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“…The WMLES calculations performed in this work are based on the high-resolution CABARET method [14][15][16][17] accelerated on Graphics Processing Units (GPU) [18]. The solver utilizes a GPU-optimized method for solving the hyperbolic part of the Navier-Stokes equations using the asynchronous time stepping at the optimal CFL number corresponding to a minimum dispersion and dissipation error [17,19].…”

Section: Introductionmentioning

confidence: 99%

Jet Installation Noise Modelling Informed by GPU LES

Abid

Markesteijn

Gryazev

et al. 2022

28th AIAA/CEAS Aeroacoustics 2022 Conference

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Jet installation beneath a wing significantly enhances jet noise at low frequencies, and its physical mechanism must be comprehended to develop efficient noise reduction solutions. A numerical investigation on the jet-installation noise is performed using Wall Modelled Large Eddy Simulation (WMLES) performed using the high-resolution CABARET method accelerated on Graphics Processing Units. To simulate jet installation, a flat plate is put outside of the jet's plume, causing a rise in noise levels due to the scattering of near-field hydrodynamic waves at the trailing edge of the plate. The configuration adopted in this work replicates a series of experiments performed at the University of Bristol, against which the numerical results are validated. The numerical simulation is performed for Mach numbers of 0.5 and 0.9, and the influence of the selected noise reduction technique, i.e., the usage of chevron nozzles in comparison with the baseline round nozzle, on the jet-installation is studied by modelling SMC006 chevron nozzle. The properties of jet-hydrodynamic pressure variations and their effect on nozzle type and Mach number are investigated. Far-field noise spectra from the isolated and installed jet cases, obtained through the Ffowcs-Williams Hawkings method, are compared at different polar angles. In addition, a hybrid semi-analytical hydrodynamic-edge scattering prediction model is implemented following the model of Lyu and Dowling [1] to analyse jet-installation noise, using inputs obtained directly from the LES calculation. The implemented model is found to capture the correct physics at peak jet installation frequencies and can be used as a robust prediction tool for jet-installation noise optimisation in the future.

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Flux-corrected dispersion-improved CABARET schemes for linear and nonlinear wave propagation problems

Cited by 28 publications

References 27 publications

Flow and Noise Predictions of the Isolated Subsonic Jets from the Doak Laboratory Experiment

Flow and Noise Predictions of the Isolated Subsonic Jets from the Doak Laboratory Experiment

A volume integral implementation of the Goldstein generalised acoustic analogy for unsteady flow simulations

Jet Installation Noise Modelling Informed by GPU LES

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