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Numerical simulation of cryogenic flows under high-pressure conditions

Fechter, Stefan and Horchler, Tim and Karl, Sebastian and Hannemann, Klaus (2019) Numerical simulation of cryogenic flows under high-pressure conditions. In: 17th International Conference on Numerical Combustion 2019. 17th International Conference on Numerical Combustion 2019, 6.-8. Mai 2019, Aachen, Deutschland.

Full text not available from this repository.

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

Abstract

The accurate numerical modeling of fluids under high-pressure conditions, e.g. in rocket combustion chambers, poses many difficult challenges. First of all, the thermodynamic state of the fluid under consideration must be modeled ranging from low cryogenic temperatures at injection to high temperatures in the flame zone. Depending on the external pressure, the fluid will undergo a transition from super- to subcritical when heated up, or in case of subcritical injection, jet break-up and evaporation will occur. All these phenomena need to be accounted for by a suitable thermodynamic model. In addition to the thermodynamic modeling, the strong non-linearity in the equation of state causes spurious pressure oscillations in combination with conservative numerical schemes commonly used in compressible solvers. This work presents recent advances in the development of Reynolds-Averaged Navier-Stokes simulations (RANS) and Detached-Eddy simulation models (DES) for rocket combustion applications. Even though RANS simulations can't resolve small scale unsteady flow features, there is a need for fast and reliable complementary tools that can provide design variables like wall heat fluxes and chamber pressure at a much lower cost than scale-resolving simulations. In order to better understand which main physical processes need to be modeled in RANS approaches, we present results from scale-resolving Detached-Eddy simulations of the numerical test case by Ruiz et al. All results are obtained with a real-gas extension of the DLR TAU code. The framework is then applied to a lab-scale combustion chamber experiment from DLR Lampoldshausen for which results are presented and discussed.

Item URL in elib:https://elib.dlr.de/123330/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical simulation of cryogenic flows under high-pressure conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fechter, StefanStefan.Fechter (at) dlr.deUNSPECIFIED
Horchler, Timtim.horchler (at) dlr.deUNSPECIFIED
Karl, SebastianSebastian.Karl (at) dlr.deUNSPECIFIED
Hannemann, Klausklaus.hannemann (at) dlr.deUNSPECIFIED
Date:May 2019
Journal or Publication Title:17th International Conference on Numerical Combustion 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TAU, cryogenic flows, combustion chamber, combustion
Event Title:17th International Conference on Numerical Combustion 2019
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):Proj TAUROS (TAU for Rocket Thrust Chamber Simulation)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Fechter, Stefan
Deposited On:16 Jan 2020 11:03
Last Modified:16 Jan 2020 11:03

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