INTER-NOISE_Moratilla-Vega_final.pdf (1.53 MB)
Download file

A coupled LES-APE approach for jet noise prediction

Download (1.53 MB)
conference contribution
posted on 11.09.2017, 12:26 by Miguel Moratilla-Vega, Hao XiaHao Xia, Gary PageGary Page
Despite the continuing advances of computing power, the state-of-the-art direct numerical simulations of jet noise are still restricted to simple problems. Additionally, many established CFD codes are potentially too dissipative for propagating acoustic waves. Hence, alternative methods are needed for complex realistic configurations. Traditionally, the combination of Large-Eddy Simulations (LES) with surface integral methods has been widely used by the research community to predict jet noise in the far-field. However, its application in complex installed configurations poses quite a challenging task in defining a suitable surrounding integral surface. Furthermore, these methods only provide information of single observer locations. In the present work, a coupled LES-APE (Acoustic Perturbation Equations) strategy is presented as an alternative to traditional methods. Two different solvers are used. The LES is performed with a density based, second order finite volume solver with the σ-subgrid-scale model. The APE code is a high-order Discontinuous Galerkin spectral/hp finite element solver. It solves the APE which does not suffer from instability issues related to the more common Linearised Euler Equations (LEE). Moreover, the APE is advantageous by means of a filtered source, propagating only true sound. It is also planned to apply this methodology to more realistic configurations such as coaxial nozzles and jet-wing-flap interaction cases.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

46th International Congress and Exposition on Noise Control Engineering

Citation

MORTILLA-VEGA, M., XIA, H. and PAGE, G.J., 2017. A coupled LES-APE approach for jet noise prediction. Presented at the 46th International Congress and Exposition on Noise Control Engineering (InterNoise 2017), Hong Kong, 27-30th. Aug, pp. 3946-3957.

Publisher

Inter-Noise

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

30/05/2017

Publication date

2017

Notes

This is a conference paper .

Language

en

Location

Hong Kong

Usage metrics

Exports