Numerical determination of nozzle admittances in rocket engines

Daniel Morgenweck, Jutta Pieringer, Thomas Sattelmayer

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

5 Scopus citations

Abstract

A numericalmethod in the time domain is introduced to assess the stability with respect to the nozzle's geometry in liquid rocket engines. A boundary condition for the injector plane in a combustion chamber is presented, where the mass flow fluctuations are set to zero. Thus the acoustic flux over the injector plane is zero even when there is mean flow normal to the boundary. Two ways of assessing the nozzles stability are shown. The first is to characterize the decaying of pressure oscillations means by the decay coefficient and the second is to determine the nozzle admittance. The procedures for obtaining both are described and the results are compared with the available experimental and analytical data.

Original languageEnglish
Title of host publicationNew Results in Numerical and Experimental Fluid Mechanics VII
Subtitle of host publicationContributions to the 16th STAB/DGLR Symposium Aachen, Germany 2008
EditorsAndreas Dillmann, Gerd Heller, Michael Klaas, Wolfgang Schroder, Hans-Peter Kreplin, Wolfgang Nitsche
Pages579-586
Number of pages8
DOIs
StatePublished - 2010

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume112
ISSN (Print)1612-2909

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