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Low-order Modeling of Combustion Instability Applied to Cryogenic Propellants

D'Alessandro, Simone and Fedeli, Gabriele and Tonti, Federica and Hardi, Justin and Oschwald, Michael and Favini, Bernardo and Nasuti, Francesco (2019) Low-order Modeling of Combustion Instability Applied to Cryogenic Propellants. In: Proceedings of the 8th European Conference for Aeronautics and Space Sciences. 8th European Conference for Aeronautics and Space Sciences EUCASS, 1. - 4. Jul. 2019, Madrid, Spain. DOI: 10.13009/EUCASS2019-617

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Abstract

Combustion instability is a major threat to be dealt with during the design and development phase of new liquid rocket engines. If unpredicted, its onset easily yields to thermal or mechanical failure of the engine and of the mission as well. The present work focuses on the low-order modeling of combustion instability. In particular, a recently introduced response function formulation is reported and applied. Its novelty lies in the indirect link between acoustics and unsteady heat release, which passes through the modeling of the shear coaxial injector dynamics. Such injector is assumed to be capable of cyclically accumulating and releasing propellant vortexes where the mixing takes place. Such model is then applied to two different test-cases, namely one fed by gaseous propellant, i.e. the CVRC test-case, while the other by supercritical fluids, namely the BKD test-case. Results show how the CVRC instability features are well reproduced, while several model improvements are needed for the BKD.

Item URL in elib:https://elib.dlr.de/130526/
Document Type:Conference or Workshop Item (Speech)
Title:Low-order Modeling of Combustion Instability Applied to Cryogenic Propellants
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
D'Alessandro, Simonesimone.dalessandro (at) uniroma1.itUNSPECIFIED
Fedeli, Gabrielefedeli.1558585 (at) studenti.uniroma1.itUNSPECIFIED
Tonti, FedericaFederica.Tonti (at) dlr.dehttps://orcid.org/0000-0001-5381-6431
Hardi, JustinJustin.Hardi (at) dlr.dehttps://orcid.org/0000-0003-3258-5261
Oschwald, MichaelMichael.Oschwald (at) dlr.dehttps://orcid.org/0000-0002-9579-9825
Favini, Bernardobernardo.favini (at) uniroma1.itUNSPECIFIED
Nasuti, Francescofrancesco.nasuti (at) uniroma1.itUNSPECIFIED
Date:2019
Journal or Publication Title:Proceedings of the 8th European Conference for Aeronautics and Space Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.13009/EUCASS2019-617
Status:Published
Keywords:rocket propulsion, combustion instability, cyrogenic, acoustics
Event Title:8th European Conference for Aeronautics and Space Sciences EUCASS
Event Location:Madrid, Spain
Event Type:international Conference
Event Dates:1. - 4. Jul. 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Antriebsystemtechnik - Schubkammertechnologie
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:18 Nov 2019 09:21
Last Modified:18 Nov 2019 09:21

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