Nonlinear behaviour of the Mack mode in a hypersonic boundary layer

Stuart A. Craig, Raymond A. Humble, Jerrod W. Hofferth, William S. Saric

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Mack-mode waves are measured in a hypersonic boundary layer using high-frequency focusing schlieren deflectometry. Experiments are performed using a flared cone at angle of attack in the low-disturbance Mach 6 Quiet Tunnel at Texas A&M University across a free-stream unit Reynolds number range of. The high-frequency response of the measurement system allows harmonics and other nonlinear behaviour to be measured. Mack-mode waves and several harmonics are clearly observed at a frequency of. Bispectral analysis is used to show that these waves undergo several quadratic phase-coupled sum and difference interactions with themselves to produce harmonics, as well interact with a relatively low-frequency wave that results in amplitude modulation. Bispectral analysis is used to highlight these interactions.

Original languageEnglish (US)
Pages (from-to)74-99
Number of pages26
JournalJournal of Fluid Mechanics
DOIs
StateAccepted/In press - Jan 1 2019

Fingerprint

boundary layer stability
Hypersonic boundary layers
hypersonic boundary layer
hypersonic flow
Hypersonic flow
Nonlinear optics
harmonic analysis
Harmonic analysis
angle of attack
nonlinear optics
Angle of attack
frequency response
Frequency response
Reynolds number
harmonics
Amplitude modulation
free flow
Mach number
tunnels
Cones

Keywords

  • boundary layer stability
  • high-speed flow
  • nonlinear instability

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Nonlinear behaviour of the Mack mode in a hypersonic boundary layer. / Craig, Stuart A.; Humble, Raymond A.; Hofferth, Jerrod W.; Saric, William S.

In: Journal of Fluid Mechanics, 01.01.2019, p. 74-99.

Research output: Contribution to journalArticle

Craig, Stuart A. ; Humble, Raymond A. ; Hofferth, Jerrod W. ; Saric, William S. / Nonlinear behaviour of the Mack mode in a hypersonic boundary layer. In: Journal of Fluid Mechanics. 2019 ; pp. 74-99.
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