Sound shielding simulation by coupled discontinuous Galerkin and fast boundary element methods. Issue 1 (31st December 2022)

• Record Type: Journal Article
• Authors: Proskurov, S.; Ewert, R.; Lummer, M.; Mößner, M.; Delfs, J. W.
• Is Part Of: Engineering applications of computational fluid mechanics. Volume 16:Issue 1(2022)
• Page Start: 1690
• Page End: 1705
• Publication Date: 2022-12-31
• Subjects: Noise shielding -- noise scattering -- discontinuous galerkin -- fast multipole method -- bounday element method -- coupling -- fan tone shielding -- aeroacoustic installation; Computational fluid dynamics -- Periodicals; 620.10640285
• DOI: 10.1080/19942060.2022.2098827
• Languages: English
• ISSNs: 1994-2060

Abstract

ABSTRACT: A code coupling has been established for performing efficient fan tone shielding simulations of aerial vehicles with unconventional engine installations. In particular, the Fast Multipole Boundary Element Method (FM-BEM) which is formulated to solve a surface integral based on the Kirchhoff-Helmholtz wave equation for large geometries is combined with a volume resolving Discontinuous Galerkin (DG) method which is well suited for the compact region around a jet engine intake where strong mean flow gradients are present. The Möhring-Howe acoustic analogy is utilised during the backward data exchange process for derivation of acoustic velocities in presence of a mean flow. The method can help to overcome a major difficulty related to computational complexity when solving fan noise shilding and scattering problems for a complete aircraft geometry.