Numerical investigations of hypersonic boundary layer transition for circular cones

Frank Husmeier, Hermann F. Fasel

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

12 Scopus citations

Abstract

This paper focuses on secondary instability mechanisms of high-speed boundary layers over cones with a circular cross section. Hypersonic tran7sition investigations at Mach 8 are performed using Direct Numerical Simulations (DNS). At wind-tunnel conditions, these simulations allow for comparison with experimental measurements to verify fundamental stability characteristics. According to Linear Stability Theory (LST) the boundary layer is most unstable to second-mode two-dimensional waves. Our investigations indicate that secondary instability mechanisms involving two-dimensional waves appear to be of lesser importance in the nonlinear stages of breakdown to turbulence in spite of the high amplification rates of the two-dimensional primary disturbances. Instead, second-mode oblique waves at small wave angles, which are almost as amplified as second-mode two-dimensional waves, dominate the nonlinear behavior.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 18th AIAA Computational Fluid Dynamics Conference
Pages289-305
Number of pages17
StatePublished - Nov 8 2007
Event18th AIAA Computational Fluid Dynamics Conference - Miami, FL, United States
Duration: Jun 25 2007Jun 28 2007

Publication series

NameCollection of Technical Papers - 18th AIAA Computational Fluid Dynamics Conference
Volume1

Other

Other18th AIAA Computational Fluid Dynamics Conference
CountryUnited States
CityMiami, FL
Period6/25/076/28/07

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Automotive Engineering

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