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Analysis of Combustion Noise Sources Using Doak's Momentum Potential Theory

D'Aniello, Raffaele and Knobloch, Karsten and Kissner, Carolin Anja (2023) Analysis of Combustion Noise Sources Using Doak's Momentum Potential Theory. Institute of Noise Control Engineering. Internoise 2022, 2022-10-21 - 2022-10-24, Glasgow, UK. doi: 10.3397/IN_2022_0148. ISBN 0736-2935. ISSN 0736-2935.

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Official URL: https://www.ingentaconnect.com/content/ince/incecp/2023/00000265/00000006/art00008


Noise emissions of modern lean combustors are related to different sources. Direct combustion noise is generated by heat release fluctuations, while indirect noise sources include the acceleration of entropy and vorticity inhomogeneities through the nozzle-guide-vane at the combustor exit. The latter noise source is characterized by the coupling of fluctuations convected in non-uniform mean flow, which can e.g. cause vortical or entropic fluctuations to be partly transferred into acoustics. Due to the complexity of the sources, a clear and quantitative separation of the different phenomena in terms of primitive variables presents a significant challenge. This study therefore proposes an alternative framework for the description of combustion noise based on Doak's Momentum Potential Theory (MPT). The MPT defines a Generalized Acoustic Field (GAF) and describes the sound production in terms of mean energy fluxes carried by the respective acoustic, thermal and turbulent fluctuating momentum components. To confirm the ability to identify the different combustion noise sources, the method was applied to Large-Eddy Simulation data of a non-reacting swirl-combustor simulator. Finally, the coherent character and spectral behavior of the GAF were investigated using a Spectral Proper Orthogonal Decomposition (SPOD) analysis and correlated to the source distributions.

Item URL in elib:https://elib.dlr.de/195363/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of Combustion Noise Sources Using Doak's Momentum Potential Theory
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
D'Aniello, RaffaeleUNSPECIFIEDhttps://orcid.org/0000-0003-1601-1356136320592
Knobloch, KarstenUNSPECIFIEDhttps://orcid.org/0000-0002-3424-0809UNSPECIFIED
Kissner, Carolin AnjaUNSPECIFIEDhttps://orcid.org/0000-0003-1094-0939UNSPECIFIED
Date:1 February 2023
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1061-1072
Publisher:Institute of Noise Control Engineering
Series Name:INTER-NOISE and NOISE-CON Congress and Conference Proceedings
Keywords:Combustion Noise, Momentum Potential Theory (MPT), Entropy noise, FACTOR, CFD, Large-Eddy Simulation (LES), Aeroacoustics, Sound generated aerodinamically
Event Title:Internoise 2022
Event Location:Glasgow, UK
Event Type:international Conference
Event Start Date:21 October 2022
Event End Date:24 October 2022
Organizer:Institute of Noise Control Engineering
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Components and Emissions, L - Virtual Engine
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: D'Aniello, Raffaele
Deposited On:05 Jun 2023 09:02
Last Modified:24 Apr 2024 20:55

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