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Journal articles
Accounting for convective effects in zero-Mach-number thermoacoustic models
Abstract : This paper presents a methodology to account for some mean-flow effects on thermo-acoustic instabilities when using the zero-Mach-number assumption. It is shown that when a computational domain is represented under the M=0 assumption, a nonzero-Mach-number element can simply be taken into account by imposing a proper acoustic impedance at the boundaries so as to mimic the mean flow effects in the outer, not computed flow domain. A model that accounts for the coupling between acoustic and entropy waves is presented. It relies on a "delayed entropy coupled boundary condition" (DECBC) for the Helmholtz equation satisfied by the acoustic pressure. The model proves able to capture low-frequency entropic modes even without mean-flow terms in the fluctuating pressure equation.
Cited literature [46 references]
https://hal.archives-ouvertes.fr/hal-00905802
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, November 18, 2013 - 4:44:52 PM
Last modification on : Monday, January 4, 2021 - 12:26:05 PM
Long-term archiving on: : Wednesday, February 19, 2014 - 12:15:12 PM
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, November 18, 2013 - 4:44:52 PM
Last modification on : Monday, January 4, 2021 - 12:26:05 PM
Long-term archiving on: : Wednesday, February 19, 2014 - 12:15:12 PM
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