Characterization of the turbulence structure in supersonic boundary layers using DNS data

Matthew J. Ringuette, M. Pino Martín, Alexander J. Smits, Minwei Wu

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

9 Scopus citations

Abstract

A direct numerical simulation database is used to characterize the structure of supersonic turbulent boundary layers at Mach numbers from 3 to 5. We develop tools to calculate the average properties of the coherent structures, namely, angle, convection velocity, and length scale, and show good agreement with the available experimental data. We find that the structure angle and convection velocity increase with Mach number, while the streamwise integral length scale decreases. The structures become taller with Mach number, which is consistent with the larger structure angle. The distribution of the streaky-structure spacing at the wall is computed, and observed to be slightly narrower and more uniform with increasing Mach number. We find that the low-speed streaks carry about one-third of the total turbulent kinetic energy. Similar to the incompressible case, we observe hairpin vortices clustered into streamwise packets at all Mach numbers, and develop an algorithm to identify and characterize these hairpin packets. The average packet convection velocity, length, and number of hairpins increase with higher Mach number, while the packet height and angle decrease.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 36th AIAA Fluid Dynamics Conference
Pages1584-1607
Number of pages24
StatePublished - Dec 11 2006
Event36th AIAA Fluid Dynamics Confernce - San Francisco, CA, United States
Duration: Jun 5 2006Jun 8 2006

Publication series

NameCollection of Technical Papers - 36th AIAA Fluid Dynamics Conference
Volume3

Other

Other36th AIAA Fluid Dynamics Confernce
CountryUnited States
CitySan Francisco, CA
Period6/5/066/8/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Ringuette, M. J., Martín, M. P., Smits, A. J., & Wu, M. (2006). Characterization of the turbulence structure in supersonic boundary layers using DNS data. In Collection of Technical Papers - 36th AIAA Fluid Dynamics Conference (pp. 1584-1607). (Collection of Technical Papers - 36th AIAA Fluid Dynamics Conference; Vol. 3).