Numerical Investigation of Hypersonic Boundary-Layer Transition for the Ogive Cone of the STORT Experiments

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

Abstract

Direct Numerical Simulations (DNS) were carried out for an ogive cone with a blunt nose-tip at Mach 7.0 in order to investigate the laminar-turbulent transition process with an emphasis on the dominant nonlinear mechanisms. The primary instability regime was investigated using Linear Stability Theory (LST) for Mach 5.3 conditions in addition to Mach 7.0 to investigate the effect of Mach number on linear amplification rates. The LST analysis indicates that both first and second mode waves are amplified albeit with small N-factors. The second mode has a wide range of amplified frequencies due to the rapid downstream increase of the boundary-layer thickness. A secondary instability study revealed that fundamental resonance resulted in larger N-factors of the secondary wave after resonance onset compared to subharmonic resonance for the M = 7.0 case. Subsequent highly resolved ‘controlled’ fundamental breakdown simulations for the M = 7.0 case exhibit typical structures associated with fundamental breakdown, including ‘primary’ and ‘secondary’ hot streak patterns that have been previously observed in experiments and DNS for a flared cone. A detailed analysis of the breakdown simulations confirmed that the "hot" streaks on the surface of the ogive geometry are generated by the same nonlinear mechanism as for the flared cone.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum 2022
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106316
DOIs
StatePublished - 2022
Externally publishedYes
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022 - San Diego, United States
Duration: Jan 3 2022Jan 7 2022

Publication series

NameAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022
Country/TerritoryUnited States
CitySan Diego
Period1/3/221/7/22

ASJC Scopus subject areas

  • Aerospace Engineering

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