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Modeling of a Coaxial Liquid Oxygen/Gaseous Hydrogen Injection Element Under High-Frequency Acoustic Disturbances

Beinke, Scott and Banuti, Daniel and Hardi, Justin and Oschwald, Michael and Dally, Bassam (2019) Modeling of a Coaxial Liquid Oxygen/Gaseous Hydrogen Injection Element Under High-Frequency Acoustic Disturbances. In: Progress in Propulsion Physics Torus Press. pp. 273-294. ISBN 978-5-94588-228-7. ISSN 2493-3503

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Official URL: https://www.eucass-proceedings.eu/articles/eucass/abs/2019/01/eucass2019_225/eucass2019_225.html

Abstract

An experimental combustor, designated BKH, is operated at DLR Lampoldshausen to investigate high-frequency combustion instability phenomena. The combustor operates with liquid oxygen (LOx) and gaseous or liquid hydrogen propellants at supercritical conditions analogous to real rocket engines. An externally imposed acoustic disturbance interacts with a series of 5 coaxial injection elements in the center of the chamber. A combination of experimental analysis and numerical modeling is used to provide further insight and understanding of the BKH experiments. Optical data from the BKH experiments are analyzed to extract the response of the §ame at the excitation frequency. A new method for reconstructing the acoustic ¦eld inside the chamber from dynamic pressure sensor data is used to describe the evolution of the acoustic mode and the local disturbance in the §ame zone. An Unsteady Reynolds-Averaged Navier�Stokes (URANS) model of a single BKH injection element subjected to representative transverse acoustic velocity excitation has been computed using a specialized release of the DLR TAU code. The single-element model reproduces the retraction of the dense LOx core during transverse velocity excitation as observed experimentally. The model also provides further insight into the §attening and §apping of the §ame. The §apping is identi¦ed as the oxygen core being transported by the transverse acoustic velocity.

Item URL in elib:https://elib.dlr.de/132699/
Document Type:Book Section
Title:Modeling of a Coaxial Liquid Oxygen/Gaseous Hydrogen Injection Element Under High-Frequency Acoustic Disturbances
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Beinke, ScottGerman Aerospace Center DLR, Institute of Space Propulsion, Lampoldshausen, DUNSPECIFIED
Banuti, DanielDaniel.Banuti (at) dlr.dehttps://orcid.org/0000-0002-5469-5704
Hardi, JustinJustin.Hardi (at) dlr.dehttps://orcid.org/0000-0003-3258-5261
Oschwald, MichaelMichael.Oschwald (at) dlr.dehttps://orcid.org/0000-0002-9579-9825
Dally, BassamUniversity of Adelaide, School of Mechanical Engineering, AustraliaUNSPECIFIED
Date:8 February 2019
Journal or Publication Title:Progress in Propulsion Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:11
DOI :10.1051/eucass/201911225
Page Range:pp. 273-294
Publisher:Torus Press
ISSN:2493-3503
ISBN:978-5-94588-228-7
Status:Published
Keywords:CFD; combustion; instability; acoustics
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: Göttingen , Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Hanke, Michaela
Deposited On:13 Dec 2019 13:10
Last Modified:13 Dec 2019 13:10

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