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Comparison of Detailed Chemistry and Flamelet Combustion Modeling in a H2/LOx Subscale Combustion Chamber

Horchler, Tim and Fechter, Stefan and Karl, Sebastian and Hannemann, Klaus (2019) Comparison of Detailed Chemistry and Flamelet Combustion Modeling in a H2/LOx Subscale Combustion Chamber. In: 17th International Conference on Numerical Combustion 2019. 17th International Conference on Numerical Combustion 2018, 6.-8. Mai 2019, Aachen, Deutschland.

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Official URL: https://nc19.itv.rwth-aachen.de/


The accurate simulation of high-pressure combustion phenomena in rocket thrust chambers is one of the key technologies in the development of future launch vehicles. Due to the harsh flow environment inside rocket engines, experimental investigations are difficult and numerical simulations are an indispensable tool for providing more detailed insights into the flow topology and the physical processes in such devices. Recent developments in reusable first stage rocket motors has sparked interest in using methane as fuel which increases the complexity of the chemistry involved. Regarding numerical simulations, such fuel-oxidizer combinations will render detailed chemistry schemes numerically very inefficient and call for simpler approaches like flamelet combustion models. In order to assess the range of validity of flamelet combustion models, this work compares experimental and numerical results for a H2/LOx subscale combustion chamber at supercritical pressures. For the particular case of H2/LOx combustion, a comparison between a detailed chemistry and a flamelet model can be made, especially concerning the assumption of unity Lewis number. In addition to that, the validity of the multi-fluid-mixing assumption (ideal gas mixture rules even for supercritical species) is investigated for different fuel/oxidizer temperature combinations. Numerical simulation results are compared to experimental data from the subscale combustion chamber BKC (Brennkammer C) operated at the DLR Lampoldshausen. These results include wall temperature and chamber pressure measurements, as well as flame length visualizations.

Item URL in elib:https://elib.dlr.de/123328/
Document Type:Conference or Workshop Item (Speech)
Title:Comparison of Detailed Chemistry and Flamelet Combustion Modeling in a H2/LOx Subscale Combustion Chamber
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Horchler, Timtim.horchler (at) dlr.deUNSPECIFIED
Fechter, StefanStefan.Fechter (at) dlr.deUNSPECIFIED
Karl, SebastianSebastian.Karl (at) dlr.deUNSPECIFIED
Hannemann, Klausklaus.hannemann (at) dlr.deUNSPECIFIED
Date:8 May 2019
Journal or Publication Title:17th International Conference on Numerical Combustion 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Realgas Effekte, überkritische Verbrennung, CFD
Event Title:17th International Conference on Numerical Combustion 2018
Event Location:Aachen, Deutschland
Event Type:international Conference
Event Dates:6.-8. Mai 2019
Organizer:The Combustion Institute
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 - Numerische Verfahren und Simulation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Horchler, Tim
Deposited On:25 Sep 2019 09:43
Last Modified:25 Sep 2019 09:43

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