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Impact of Different Chemical Models on the Numerical Prediction of Dual-Bell Nozzle Transition

Schneider, Dirk and Génin, Chloé (2016) Impact of Different Chemical Models on the Numerical Prediction of Dual-Bell Nozzle Transition. [Other]

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A numerical study was conducted at the German Aerospace Center in Lampoldshausen, to investigate the impact of various chemical models on reactive nozzle flow. Therefore, a chemical reaction mechanism for oxygen/methane combustion was implemented into DLR's flow solver TAU. Ignition delay simulations were conducted to demonstrate the validity of the implementation. The implemented baseline chemistry model was applied for generic nozzle flow simulations and the results were compared to frozen nozzle flow and approach. The baseline reaction mechanism was reduced to a basic configuration and applied to the generic nozzle flow. A good agreement with the baseline model was observed. Both approaches were aplied for dual-bell nozzle flow simulations. Validation data for the simulations were obtained during a hot flow test campaign. The experiments yielded a clear impact of the combustion chamber mixture ratio on the dual-bell transition nozzle pressure ratio. RANS simulations of the dual-bell nozzle flow were conducted and almost no deviation between baseline and reduced chemical approach was observed. A reduction of 93 % of the computational cost was reached with the reduced model. The dual-bell transition behavior at different values of combustion chamber mixture ratio was investigated, applying RANS simulations with reduced chemistry model. The impact of the mixture ratio on the transition NPR was clearly reproduced by the numerical approach. A good agreement with the experimentally obtained transition NPR values was reached.

Item URL in elib:https://elib.dlr.de/109003/
Document Type:Other
Title:Impact of Different Chemical Models on the Numerical Prediction of Dual-Bell Nozzle Transition
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schneider, DirkDirk.Schneider (at) dlr.deUNSPECIFIED
Génin, ChloéChloe.Genin (at) dlr.deUNSPECIFIED
Journal or Publication Title:SFB/TRR 40 Annual Report 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 325-344
Keywords:dual-bell nozzle, rocket nozzle, nozzle flow
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:06 Dec 2016 09:25
Last Modified:06 Dec 2016 09:25

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