New advances in the use of Actran/TM for nacelle simulations

Antwerpen, Bernard Van; Leneveu, Romain; Caro, Stéphane; Ferrante, Piergiorgio

doi:10.2514/6.2008-2827

Cited by 13 publications

(13 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An improved formulation which uses mapped infinite elements in place of the original wave envelope elements was developed in the late 1990s [13] and is implemented in commercially available codes such as ACTRAN/TM [35]. The FE/IE approach is unstructured and has fourth order dispersion characteristics when quadratic elements are used [36].…”

Section: Finite Element Helmholtz Methodsmentioning

confidence: 99%

“…The problem of solving large linear systems at acceptable computational cost has been partially ameliorated by improved parallel direct solvers [38]. Current capabilities and limitations are detailed in [35] where a three-dimensional FE/IE model is presented for the bellmouth intake of a CF34-8E/Embraer nacelle. Single frequency analyses are performed at a Helmholtz number, kR, of around 40.…”

Section: Finite Element Helmholtz Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A review of CAA for fan duct propagation and radiation, with application to liner optimisation

Astley

Sugimoto

Achunche

et al. 2010

Procedia Engineering

View full text Add to dashboard Cite

This article reviews the application of Computational Aero-Acoustics (CAA) to the prediction of acoustic propagation in turbofan ducts. The challenge of resolving the radiated sound field for realistic nacelle geometries is discussed and evidence is presented to indicate that current CAA is able to represent the effect of in-duct liners on far-field measured rig and engine data. Two approaches are presented for incorporating CAA predictions within liner optimisation schemes for a turbofan intake.

show abstract

Section: Finite Element Helmholtz Methodsmentioning

confidence: 99%

Section: Finite Element Helmholtz Methodsmentioning

confidence: 99%

A review of CAA for fan duct propagation and radiation, with application to liner optimisation

Astley

Sugimoto

Achunche

et al. 2010

Procedia Engineering

View full text Add to dashboard Cite

show abstract

“…The converged, timeharmonic pressure field obtained from the DGM computation when the 3 $4 radial mode is incident, gives a numerical prediction for a complex pressure amplitude, ),5 case when the (+, 3) mode is incident with unit amplitude. A prediction for the complex pressure field ) 6 , when a combination of Q modes is present with arbitrary modal source amplitudes 7 )5 is then given by .…”

Section: Model 2(b) the In-duct Axisymmetric Modelmentioning

confidence: 99%

“…In the current study, the mean flow is obtained by running a compressible, irrotational, Euler flow solver [6] [27]. A slip condition is assumed on the rigid surfaces.…”

Section: B Caa Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

Integrating CFD source predictions with time-domain CAA for intake fan noise prediction

Rarata

Gabard

Sugimoto

et al. 2014

20th AIAA/CEAS Aeroacoustics Conference

View full text Add to dashboard Cite

A method is proposed for integrating a source prediction obtained from a Computational Fluid Dynamics (CFD) model for the fan stage of a turbofan engine with a Computational Aero-Acoustics (CAA) propagation code to predict tonal noise radiation in the far field. The Reynolds-Averaged Navier-Stokes equations are used to model the generation of the tones. Their propagation through the intake is simulated by applying the Discontinuous Galerkin Method to solve the linearized Euler equations in the time domain. The CFD and the CAA solutions are matched in a region where both solutions overlap and where non-linear effects, important close to the fan, can be considered to be less significant. An equivalent modal source on a notional source plane behind the fan is used to duplicate the sound field in this matching region and is then to drive a fully three-dimensional CAA radiation model for a near-field acoustic solution. The far-field sound pressure is obtained by applying the Ffowcs Williams-Hawkings formulation on a porous surface within the CAA domain. The accuracy and efficiency of this approach are investigated and results obtained are compared to measured data from a fan rig.

show abstract

Aircraft noise and its nearfield propagation computations

Zhang

2012

Acta Mech Sin

View full text Add to dashboard Cite

New advances in the use of Actran/TM for nacelle simulations

Cited by 13 publications

References 5 publications

A review of CAA for fan duct propagation and radiation, with application to liner optimisation

A review of CAA for fan duct propagation and radiation, with application to liner optimisation

Integrating CFD source predictions with time-domain CAA for intake fan noise prediction

Aircraft noise and its nearfield propagation computations

Contact Info

Product

Resources

About