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Thermoacoustic characterization of a swirl premixed flame using Doak's Momentum Potential Theory

D'Aniello, Raffaele and Gövert, Simon and Janus, Bertram and Knobloch, Karsten (2023) Thermoacoustic characterization of a swirl premixed flame using Doak's Momentum Potential Theory. ASME Turbo Expo 2023, 25. 30. June 2023, Boston, Massachusetts, USA.

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Abstract

This study proposes a novel approach, based on Doak's Momentum Potential Theory, for the characterization of the thermoacoustic behavior of turbulent premixed flames. The novel approach has the following two advantages: firstly, an unambiguously separation of acoustic, thermal and turbulent dynamics is achieved by means of a Helmholtz decomposition of the momentum fluctuations density; secondly, the development as well as the interaction between the different dynamics are related to the fluxes of turbulent, acoustic, and thermal mean energies, which can be identified in the fluctuating stagnation enthalpy. The Momentum Potential Theory is applied here for the first time to describe the thermoacoustic behaviour of a confined turbulent flame, represented by large-eddy simulation data of a premixed CH4/Air model combustor. Interaction and energy exchange mechanisms between the fluctuations are analyzed in order to show the potential of the theory as a general framework for the characterization of thermoacoustic problems.

Item URL in elib:https://elib.dlr.de/195360/
Document Type:Conference or Workshop Item (Speech)
Title:Thermoacoustic characterization of a swirl premixed flame using Doak's Momentum Potential Theory
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
D'Aniello, RaffaeleUNSPECIFIEDhttps://orcid.org/0000-0003-1601-1356UNSPECIFIED
Gövert, SimonUNSPECIFIEDhttps://orcid.org/0000-0003-4593-1776UNSPECIFIED
Janus, BertramUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knobloch, KarstenUNSPECIFIEDhttps://orcid.org/0000-0002-3424-0809UNSPECIFIED
Date:2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Momentum Potential Theory (MPT), Thermo-acoustics, Premixed flames
Event Title:ASME Turbo Expo 2023
Event Location:Boston, Massachusetts, USA
Event Type:international Conference
Event Dates:25. 30. June 2023
Organizer:American Society of Mechanical Engineering (ASME)
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
Location: Berlin-Charlottenburg , Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Institute of Propulsion Technology > Combustor
Deposited By: D'Aniello, Raffaele
Deposited On:05 Jun 2023 09:01
Last Modified:05 Jun 2023 09:01

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