Turbulent jet simulation using high-order DG methods for aeroacoustics analysis

TL;DR

This paper demonstrates the application of high-order discontinuous Galerkin methods for large-eddy simulation of turbulent jets, focusing on aeroacoustic analysis and validation against experimental data and finite volume benchmarks.

Contribution

It introduces a high-order DG approach for LES of turbulent jets and assesses its accuracy in aeroacoustic predictions compared to established methods.

Findings

DG method achieves accurate flow and acoustic predictions

Comparison shows good agreement with experiments and finite volume results

High-order DG methods are promising for aeroacoustic simulations

Abstract

In this work, a high-order discontinuous Galerkin (DG) method is used to perform a large-eddy simulation (LES) of a subsonic isothermal jet at high Reynolds number Re D = 10^6 on a fully un-structured mesh. Its radiated acoustic field is computed using the Ffowcs Williams and Hawkings formulation. In order to assess the accuracy of the DG method, the simulation results are compared to experimental measurements and a reference simulation based on a finite volume method. The comparisons are made on the flow quantities (mean, rms and spectra) and pressure far field (rms and spectra).