Dynamic Mode Decomposition Of Detonation Waves

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Dynamic Mode Decomposition Of Detonation Waves

Show simple item record Kumar, Rahul en_US 2012-07-25T19:10:22Z 2012-07-25T19:10:22Z 2012-07-25 January 2012 en_US
dc.identifier.other DISS-11658 en_US
dc.description.abstract Dynamic mode decomposition is applied to study the self-excited fluctuations supported by transversely unstable detonations. The focus of this study is on the effect of forcing on the limit cycle solutions. Using DMD, only the most coherent modes are analyzed. The most coherent modes in this case are the fundamental and the fourth harmonic. The analysis is based on the coherency of the self-excited detonation modes due to turbulence. Analysis reveals coherency is significantly affected with a turbulent Mach number greater than 0.3 and also the regions downstream of the shock are more affected by turbulence than the region just behind the shock. The effect of forcing is also analyzed in terms of the four fundamental energy modes: acoustic, kinetic, entropic and chemical. Results of the modal decomposition suggest that the near shock region is controlled by thermo-acoustic instability and a far field region dominated by convected turbulence. en_US
dc.description.sponsorship Massa, Luca en_US
dc.language.iso en en_US
dc.publisher Aerospace Engineering en_US
dc.title Dynamic Mode Decomposition Of Detonation Waves en_US
dc.type M.S. en_US
dc.contributor.committeeChair Massa, Luca en_US Aerospace Engineering en_US Aerospace Engineering en_US University of Texas at Arlington en_US masters en_US M.S. en_US

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