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Modeling Combustion Chamber Acoustics Using the DLR TAU Code

Horchler, Tim and Karl, Sebastian and Hannemann, Klaus and Gernoth, Andreas and De Rosa, M. (2018) Modeling Combustion Chamber Acoustics Using the DLR TAU Code. In: Space Propulsion 2018. Space Propulsion 2018, 2018-05-14 - 2018-05-18, Sevilla, Spanien.

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Official URL: https://spacepropulsion2018.com/


Combustion chamber instabilities are poorly understood and remain a major concern during the design phase of rocket thrust chambers. It is therefore desirable to develop numerical tools for investigating combustion stability issues in early phases of thrust chamber design for cryogenic propellants like LOX-LH2 or LOX-LNG. This work was performed in the frame of an ESA TRP “Coupling Mechanisms of Combustion and Acoustics in Rocket Combustors”. In this work, we investigate the ability of the DLR TAU code to predict combustion chamber eigenfrequencies and damping rates for different test cases from earlier REST modelling workshops. A large variety of modelling approaches are investigated and compared to experimental data. Different methods for evaluating the combustion chamber frequency and damping from numerical simulations are presented and discussed. In addition to the investigation of eigenmodes in combustion chambers, the acoustic properties of the TAU boundary conditions are tested in detail in a separate test case. Also partially-reflecting boundary conditions are explored for their applicability to combustion chamber simulations. We find a good agreement between the experimental results from the test cases and simulations with TAU for all test cases considered. Regarding the acoustic properties of the boundary conditions, we present an equivalent acoustic type for all boundary conditions available in TAU.

Item URL in elib:https://elib.dlr.de/119339/
Document Type:Conference or Workshop Item (Speech)
Title:Modeling Combustion Chamber Acoustics Using the DLR TAU Code
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Karl, SebastianUNSPECIFIEDhttps://orcid.org/0000-0002-5558-6673UNSPECIFIED
Journal or Publication Title:Space Propulsion 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:CFD, Brennkammer, Akustik, URANS, Randbedingungen
Event Title:Space Propulsion 2018
Event Location:Sevilla, Spanien
Event Type:international Conference
Event Start Date:14 May 2018
Event End Date:18 May 2018
Organizer:Association Aéronautique et Astronautique de France
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Project TAUROS (TAU for Rocket Thrust Chamber Simulation)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Bachmann, Barbara
Deposited On:12 Jun 2018 15:15
Last Modified:24 Apr 2024 20:23

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