Calculation of the Thermoacoustic Stability of a Main Stage Thrust Chamber Demonstrator

Alexander Chemnitz, Thomas Sattelmayer

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

The stability behavior of a virtual thrust chamber demonstrator with low injection pressure loss is studied numerically. The approach relies on an eigenvalue analysis of the Linearized Euler Equations. An updated form of the stability prediction procedure is outlined, addressing mean flow and flame response calculations. The acoustics of the isolated oxidizer dome are discussed as well as the complete system incorporating dome and combustion chamber. The coupling between both components is realized via a scattering matrix representing the injectors. A flame transfer function is applied to determine the damping rates. Thereby it is found that the procedure for the extraction of the flame transfer function from the CFD solution has a significant impact on the stability predictions.

Original languageEnglish
Title of host publicationNotes on Numerical Fluid Mechanics and Multidisciplinary Design
PublisherSpringer Science and Business Media Deutschland GmbH
Pages235-247
Number of pages13
DOIs
StatePublished - 2021

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume146
ISSN (Print)1612-2909
ISSN (Electronic)1860-0824

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