Fundamental resonance breakdown for a flared cone at mach 6

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Scopus citations


Direct Numerical Simulations (DNS) are carried out to investigate laminar-turbulent transition initiated by a fundamental resonance scenario for a flared cone at Mach 6. The model geometry of the flared cone experiments in the Boeing/AFOSR Mach 6 Quiet Tunnel (BAM6QT) at Purdue University is used for the simulations. Low grid-resolution simulations were first carried out in order to identify if the subharmonic or the fundamental resonance is the stronger secondary instability mechanism. The azimuthal wave number of the secondary waves that lead to the strongest secondary growth rate was found for both resonance scenarios. It was found that for the experimental conditions considered here, fundamental resonance resulted in much larger secondary instability growth rates than subharmonic resonance. Subsequently, detailed investigations were carried out using highresolution DNS for three different azimuthal wave numbers. A case with the azimuthal wave number equal to the one that led to the strongest secondary growth rate is compared to the cases using an azimuthal wave number that is either larger or smaller compared to this wave number. For all cases the simulation results exhibit the development of streamwise streaks of high skin friction and of high heat transfer at the cone surface. Streamwise streaks on the surface of the cone were also observed using temperature sensitive paint in the experiments carried out at Purdue University (BAM6QT facility).

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624104473
StatePublished - 2017
Event55th AIAA Aerospace Sciences Meeting - Grapevine, United States
Duration: Jan 9 2017Jan 13 2017

Publication series

NameAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting


Other55th AIAA Aerospace Sciences Meeting
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Aerospace Engineering


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