Direct numerical simulations of the nonlinear transition regime on a flat plate at mach 6

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

11 Scopus citations


Direct Numerical Simulations (DNS) were carried out in order to investigate the laminar-turbulent transition process on a flat plate boundary layer at Mach 6. Of particular interest is the nonlinear regime and whether any of the classical nonlinear breakdown mechanisms (fundamental resonance, subharmonic resonance, oblique breakdown) are relevant in the case of a flat plate. The conditions of the Boeing/AFOSR Mach 6 Quiet Tunnel (BAM6QT) at Purdue University were used for the simulations. In order to investigate the relevant breakdown mechanism, the flow is perturbed with a short-duration pulse through a small blowing and suction hole at the wall. The resulting three-dimensional wave packets contain a wide range of frequencies and wavenumbers. The development of the wave packet as it propagates through the computational domain is explored with respect to the linear and the nonlinear regime by forcing with different initial disturbance amplitudes. In addition, the effect of forcing hole dimensions on the initial development of the wave packet downstream of the forcing location was explored.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages17
ISBN (Print)9781624105951
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF


ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Aerospace Engineering


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