Crossflow instability in a hypersonic boundary layer

Stuart A. Craig, William S. Saric

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The crossflow instability in a hypersonic, laminar boundary layer is investigated using point measurements inside the boundary layer for the first time. Experiments are performed on a 7° right, circular cone with an adiabatic wall condition at 5.6° angle of incidence in the low-disturbance Mach 6 Quiet Tunnel at Texas A&M University. Measurements are made with a constant-temperature hot-wire anemometer system with a frequency response up to 180 kHz. Stationary crossflow waves are observed to grow and saturate. A travelling wave coexists with the stationary wave and occurs in a frequency band centred around 35 kHz. A type-I secondary instability is also observed in a frequency band centred around 110 kHz. The behaviour of all three modes is largely consistent with their low-speed counterparts prior to saturation of the stationary wave. Afterward, the behaviour remains in partial agreement with the low-speed case. Neither type-II secondary instability nor transition to turbulence are observed in this study.

Original languageEnglish (US)
Pages (from-to)224-244
Number of pages21
JournalJournal of Fluid Mechanics
Volume808
DOIs
StatePublished - Dec 10 2016

Fingerprint

Hypersonic boundary layers
hypersonic boundary layer
low speed
circular cones
hot-wire anemometers
Frequency bands
laminar boundary layer
hypersonics
traveling waves
frequency response
Laminar boundary layer
tunnels
boundary layers
Anemometers
Hypersonic aerodynamics
disturbances
incidence
turbulence
Mach number
Frequency response

Keywords

  • boundary layer stability
  • compressible boundary layers
  • transition to turbulence

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Crossflow instability in a hypersonic boundary layer. / Craig, Stuart A.; Saric, William S.

In: Journal of Fluid Mechanics, Vol. 808, 10.12.2016, p. 224-244.

Research output: Contribution to journalArticle

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