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Dynamic mode decomposition analysis of detonation waves
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| Zeitschriftentitel: | Physics of Fluids |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Physics of Fluids, 24, 2012, 6 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
AIP Publishing
|
| Schlagwörter: |
| author_facet |
Massa, L. Kumar, R. Ravindran, P. Massa, L. Kumar, R. Ravindran, P. |
|---|---|
| author |
Massa, L. Kumar, R. Ravindran, P. |
| spellingShingle |
Massa, L. Kumar, R. Ravindran, P. Physics of Fluids Dynamic mode decomposition analysis of detonation waves Condensed Matter Physics Fluid Flow and Transfer Processes Mechanics of Materials Computational Mechanics Mechanical Engineering |
| author_sort |
massa, l. |
| spelling |
Massa, L. Kumar, R. Ravindran, P. 1070-6631 1089-7666 AIP Publishing Condensed Matter Physics Fluid Flow and Transfer Processes Mechanics of Materials Computational Mechanics Mechanical Engineering http://dx.doi.org/10.1063/1.4727715 <jats:p>Dynamic mode decomposition is applied to study the self-excited fluctuations supported by transversely unstable detonations. The focus of this study is on the stability of the limit cycle solutions and their response to forcing. Floquet analysis of the unforced conditions reveals that the least stable perturbations are almost subharmonic with ratio between global mode and fundamental frequency λi/ωf = 0.47. This suggests the emergence of period doubling modes as the route to chaos observed in larger systems. The response to forcing is analyzed in terms of the coherency of the four fundamental energy modes: acoustic, entropic, kinetic, and chemical. Results of the modal decomposition suggest that the self-excited oscillations are quite insensitive to vortical forcing, and maintain their coherency up to a forcing turbulent Mach number of 0.3.</jats:p> Dynamic mode decomposition analysis of detonation waves Physics of Fluids |
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Dynamic mode decomposition analysis of detonation waves |
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Dynamic mode decomposition analysis of detonation waves |
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Dynamic mode decomposition analysis of detonation waves |
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Dynamic mode decomposition analysis of detonation waves |
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Dynamic mode decomposition analysis of detonation waves |
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Dynamic mode decomposition analysis of detonation waves |
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dynamic mode decomposition analysis of detonation waves |
| topic |
Condensed Matter Physics Fluid Flow and Transfer Processes Mechanics of Materials Computational Mechanics Mechanical Engineering |
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http://dx.doi.org/10.1063/1.4727715 |
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2012 |
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<jats:p>Dynamic mode decomposition is applied to study the self-excited fluctuations supported by transversely unstable detonations. The focus of this study is on the stability of the limit cycle solutions and their response to forcing. Floquet analysis of the unforced conditions reveals that the least stable perturbations are almost subharmonic with ratio between global mode and fundamental frequency λi/ωf = 0.47. This suggests the emergence of period doubling modes as the route to chaos observed in larger systems. The response to forcing is analyzed in terms of the coherency of the four fundamental energy modes: acoustic, entropic, kinetic, and chemical. Results of the modal decomposition suggest that the self-excited oscillations are quite insensitive to vortical forcing, and maintain their coherency up to a forcing turbulent Mach number of 0.3.</jats:p> |
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| author | Massa, L., Kumar, R., Ravindran, P. |
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| description | <jats:p>Dynamic mode decomposition is applied to study the self-excited fluctuations supported by transversely unstable detonations. The focus of this study is on the stability of the limit cycle solutions and their response to forcing. Floquet analysis of the unforced conditions reveals that the least stable perturbations are almost subharmonic with ratio between global mode and fundamental frequency λi/ωf = 0.47. This suggests the emergence of period doubling modes as the route to chaos observed in larger systems. The response to forcing is analyzed in terms of the coherency of the four fundamental energy modes: acoustic, entropic, kinetic, and chemical. Results of the modal decomposition suggest that the self-excited oscillations are quite insensitive to vortical forcing, and maintain their coherency up to a forcing turbulent Mach number of 0.3.</jats:p> |
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| imprint_str_mv | AIP Publishing, 2012 |
| institution | DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-D161 |
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| spelling | Massa, L. Kumar, R. Ravindran, P. 1070-6631 1089-7666 AIP Publishing Condensed Matter Physics Fluid Flow and Transfer Processes Mechanics of Materials Computational Mechanics Mechanical Engineering http://dx.doi.org/10.1063/1.4727715 <jats:p>Dynamic mode decomposition is applied to study the self-excited fluctuations supported by transversely unstable detonations. The focus of this study is on the stability of the limit cycle solutions and their response to forcing. Floquet analysis of the unforced conditions reveals that the least stable perturbations are almost subharmonic with ratio between global mode and fundamental frequency λi/ωf = 0.47. This suggests the emergence of period doubling modes as the route to chaos observed in larger systems. The response to forcing is analyzed in terms of the coherency of the four fundamental energy modes: acoustic, entropic, kinetic, and chemical. Results of the modal decomposition suggest that the self-excited oscillations are quite insensitive to vortical forcing, and maintain their coherency up to a forcing turbulent Mach number of 0.3.</jats:p> Dynamic mode decomposition analysis of detonation waves Physics of Fluids |
| spellingShingle | Massa, L., Kumar, R., Ravindran, P., Physics of Fluids, Dynamic mode decomposition analysis of detonation waves, Condensed Matter Physics, Fluid Flow and Transfer Processes, Mechanics of Materials, Computational Mechanics, Mechanical Engineering |
| title | Dynamic mode decomposition analysis of detonation waves |
| title_full | Dynamic mode decomposition analysis of detonation waves |
| title_fullStr | Dynamic mode decomposition analysis of detonation waves |
| title_full_unstemmed | Dynamic mode decomposition analysis of detonation waves |
| title_short | Dynamic mode decomposition analysis of detonation waves |
| title_sort | dynamic mode decomposition analysis of detonation waves |
| title_unstemmed | Dynamic mode decomposition analysis of detonation waves |
| topic | Condensed Matter Physics, Fluid Flow and Transfer Processes, Mechanics of Materials, Computational Mechanics, Mechanical Engineering |
| url | http://dx.doi.org/10.1063/1.4727715 |