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Numerical Investigation of Flame-Acoustic Interaction at Resonant and Non-Resonant Conditions in a Model Combustion Chamber

Horchler, Tim and Fechter, Stefan and Hardi, Justin (2021) Numerical Investigation of Flame-Acoustic Interaction at Resonant and Non-Resonant Conditions in a Model Combustion Chamber. Symposium on Thermoacoustics in Combustion: Industry meets Academia, 06.-10. Sep. 2021, München, Deutschland.

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Official URL: https://www.events.tum.de/frontend/index.php?folder_id=992

Abstract

This paper investigates flame-acoustic interaction in a model combustion chamber using detached-eddy simulation methods (DES) in three different setups. We present simulation results for a new load point of combustion chamber H from DLR Lampoldshausen and explore the flame response to resonant and non-resonant external excitation. The first part of the paper shows results for the steady-state flow field without siren excitation. These results are used to determine the combustion chamber eigenmodes by means of an impulse-response approach and we compare the results to experimental data and Helmholtz modes. In the second part of this paper, numerical results with transversal excitation at non-resonant conditions are compared to the steady-state eigenmodes and it is argued that the nonresonant excitation is a more realistic representation of the experimental situation than the unexcited steady-state simulation. The last part of the paper compares non-resonant and resonant simulations and reports a strong influence of resonant siren excitation on the shape and length of the dense LOx cores and the flame field which confirms previous studies of similar configurations.

Item URL in elib:https://elib.dlr.de/141937/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical Investigation of Flame-Acoustic Interaction at Resonant and Non-Resonant Conditions in a Model Combustion Chamber
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Horchler, TimTim.Horchler (at) dlr.dehttps://orcid.org/0000-0002-8439-8786
Fechter, StefanStefan.Fechter (at) dlr.dehttps://orcid.org/0000-0002-8439-8786
Hardi, JustinJustin.Hardi (at) dlr.dehttps://orcid.org/0000-0003-3258-5261
Date:6 September 2021
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:numerical simulations, flame response, scale-resolving simulations, flamelets, real-gas thermodynamics
Event Title:Symposium on Thermoacoustics in Combustion: Industry meets Academia
Event Location:München, Deutschland
Event Type:international Conference
Event Dates:06.-10. Sep. 2021
Organizer:Technische Universität München
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Project Amadeus
Location: Göttingen , Lampoldshausen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Institute of Space Propulsion > Rocket Propulsion Technology
Deposited By: Horchler, Tim
Deposited On:04 Nov 2021 08:40
Last Modified:04 Nov 2021 08:40

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