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Simulation of LOx/GH2 single coaxial injector at high pressure conditions

Fechter, Stefan and Karl, Sebastian and Hannemann, Volker and Hannemann, Klaus (2017) Simulation of LOx/GH2 single coaxial injector at high pressure conditions. AIAA/SAE/ASEE Joint Propulsion Conference, AIAA Propulsion and Energy Forum, 10.-12. Juli 2017, Atlanta, GA, USA. DOI: 10.2514/6.2017-4765

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Official URL: https://arc.aiaa.org/doi/abs/10.2514/6.2017-4765

Abstract

The numerical prediction of the processes in rocket combustion chambers is still challenging due to a variety of problems that are not completly investigated nor completly understood within computational fluid dynamics (CFD): First to mention is the accurate prediction of the jet behavior for sub- and supercritical conditions of propellents (e.\,g. liquid oxygen LOx) that influences the whole combustion process as well as the flame structure. Another challenge for the numerical method are the dissimilar length scales and material properties for the liquid and gaseous parts in combination with the chemical reactions for the LOx-GH2 combustion. In this study we use the TAU numerical flow solver for the simulation of single-injector experiments conducted at the German Aerospace Center (DLR) in Lampoldshausen. Based on experimental investigations in a windowed DLR subscale thrust chamber ``C'' (designated BKC) the numerical method in TAU for the simulation of sub- und supercritical LOx-GH2 combustion and atomization model is validated. Liquid oxygen and gaseous hydrogen have been injected through a single coaxial nozzle injector element. For validation of the numerical codes extensive measurements of OH emissions and shadowgraph images of the jet structure are available. Furthermore, wall pressure and temperature measurement data are available that are useful for the validation of the numerical framework. With this study we aim to validate an extension to the TAU flow solver that handles efficiently cryogenic fluids. This solver is able to predict the atomization and combustion processes within rocket combustion chambers at typical operating conditions. For validation we compare the numerical results for one super- and one subcritical load step measured in the experimental BKC campaign.

Item URL in elib:https://elib.dlr.de/114170/
Document Type:Conference or Workshop Item (Speech)
Additional Information:https://arc.aiaa.org/doi/book/10.2514/MJPC17
Title:Simulation of LOx/GH2 single coaxial injector at high pressure conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fechter, StefanStefan.Fechter (at) dlr.deUNSPECIFIED
Karl, Sebastiansebastian.karl (at) dlr.deUNSPECIFIED
Hannemann, VolkerVolker.Hannemann (at) dlr.deUNSPECIFIED
Hannemann, Klausklaus.hannemann (at) dlr.deUNSPECIFIED
Date:2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2017-4765
Status:Published
Keywords:combustion, real-fluid mixing, TAU
Event Title:AIAA/SAE/ASEE Joint Propulsion Conference, AIAA Propulsion and Energy Forum
Event Location:Atlanta, GA, USA
Event Type:international Conference
Event Dates:10.-12. Juli 2017
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 - Raumfahrzeugsysteme - Systemanalyse Raumtransport
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Bachmann, Barbara
Deposited On:18 Sep 2017 16:55
Last Modified:18 Sep 2017 16:55

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