Noise Predictions for High Subsonic Single and Dual-Stream Jets in Flight

Saxena, Swati; Morris, Philip J.

doi:10.2514/6.2012-2082

Cited by 11 publications

(2 citation statements)

References 23 publications

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“…from the jet centreline. A few years later, in 2012, Saxena and Morrisy [19] introduced a numerical study for predicting jet noise from single-and dual-stream of high subsonic flow. The researchers employed a parallel unsteady Reynolds-averaged Navier-Stokes (URANS) LES for performing the turbulent flow simulation, using a modified detached eddy simulation (DES) for generating the turbulence flow.…”

Section: Literature Reviewmentioning

confidence: 99%

Efficient Implementation of the Lattice Boltzmann Method on a GPU for Predicting Near-Field and Far-field Jet Noise

Noah,

Abdelrahim,

Mosa

et al. 2024

Preprint

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The lattice Boltzmann method (LBM) is a powerful technique for the computational modelling of a wide variety of single and multiphase flows in complex geometries. It is a discrete computational approach based on solving the Boltzmann equation numerically. LBM has recently become one of the new and promising CFD methods to solve many computational fluid mechanics problems. LBM works particularly well when solving incompressible flow problems, but limitations arise when solving compressible flow, especially at high Mach numbers. Compressible LBM was applied for the simulation jet flow in order to demonstrate the ability of the fifth-order equilibrium distribution function to simulate compressible flows efficiently. The near-field flow physics and noise simulations were performed using the compressible LBM. The results from the LBM simulation were then employed in Kirchhoff’s surface integral approach to predict far-field jet noise. Because of the ability of the lattice Boltzmann technique to be used in parallel computing and to improve LBM computational efficiency with respect to the numerical simulations of turbulent flows in predicting far-field noise, the final step in this research was to use the compute unified device architecture (CUDA) for implementing the LBM in a graphics processing unit (GPU), thus creating a hybrid code, LBM-MRT-LES, through the utilization of the Kirchhoff integral method, a powerful tool for simulating aeroacoustics problems.

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Section: Literature Reviewmentioning

confidence: 99%

Efficient Implementation of the Lattice Boltzmann Method on a GPU for Predicting Near-Field and Far-field Jet Noise

Noah,

Abdelrahim,

Mosa

et al. 2024

Preprint

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show abstract

“…Such methods have shown many capabilities for simulating jets. Eastwood et al , 20 Saxena and Morris, 27 Brunet 9 or Brès et al , 8 for instance, performed jet predictions using such an approach. The present work is a sensitivity study prior to a deeper use of the Zonal Detached Eddy Simulation (ZDES) approach, developed by Deck, 15,16 on a dual-stream nozzle with a plug.…”

Section: Introductionmentioning

confidence: 97%

Sensitivity to inflow conditions of a dual-stream nozzle

Verrière¹,

Brunet²,

Bourdeau³

et al. 2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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This paper presents a study of the effects of total pressure and temperature conditions at the inlet of a dual-stream nozzle. The design and operating conditions of the nozzle are typically those of an aircraft engine. Major part of the study has been performed with RANS computations on an axisymetrical mesh. Variations of inlet conditions consist in a variation of values injected and in the use of profiles as boundary conditions. The article focuses on the effects on the mass flow, the shock-cells positioning and the closeto exit region velocities. Results are compared with experimental data. The effect of inflow boundary conditions is quantified and the interest of non-uniform profile injection in the fan channel is exhibited. Some computations enforcing ZDES (Zonal Detached Eddy Simulation) are performed and enable to analyze turbulent variables into more details.

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Body Force Modelling of Internal Geometry for Jet Noise Prediction

Tyacke

Naqavi

Tucker

2015

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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The noise produced by aeroengines is a critical topic in engine design. Large-Eddy Simulation (LES) and hybrid Reynolds-Averaged Navier-Stokes (RANS)-LES provides a method to increase understanding of influences on the noise produced and could lead to improved models for use in design. Use of Immersed Boundary (IB) and Body Force Methods (BFM) allows arbitrary geometry to be added rapidly and so this is explored to model internal geometry effects on jet noise. This reduces grid complexity and broadens the accessible design space by reducing setup time and computational cost. Using LES and BFM/IB, many effects that are difficult to test experimentally can be assessed numerically within useful timeframes. To enable challenging targets for jet noise to be met, the importance of the many influences on jet noise must be understood. These include the use of, single or dual stream jet nozzles, the presence (or lack of) of a pylon, wing, flap and deflection angles, nozzle serrations, eccentricity, temperature and velocity ratio, flight stream and upstream/internal geometry effects. The latter effects are the main focus of this study. Nomenclature

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Noise Predictions for High Subsonic Single and Dual-Stream Jets in Flight

Cited by 11 publications

References 23 publications

Efficient Implementation of the Lattice Boltzmann Method on a GPU for Predicting Near-Field and Far-field Jet Noise

Efficient Implementation of the Lattice Boltzmann Method on a GPU for Predicting Near-Field and Far-field Jet Noise

Sensitivity to inflow conditions of a dual-stream nozzle

Body Force Modelling of Internal Geometry for Jet Noise Prediction

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