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Applied Mathematics and Mechanics

, Volume 40, Issue 2, pp 283–292 | Cite as

Transition control of Mach 6.5 hypersonic flat plate boundary layer

  • Yunchi ZhangEmail author
  • Chi Li
Article
  • 4 Downloads

Abstract

An artificial disturbance is introduced into the boundary layer over a flat plate to investigate the effect on the transition process in the Mach 6.5 wind tunnel at Peking University. A linear stability theory (LST) is utilized to predict the evolution of the eigenmodes, and the frequency of the artificial disturbance is chosen according to the LST results. The artificial disturbance is generated by glowing discharge on the surface of the plate close to the leading edge. The Rayleigh-scattering visualization and particle image velocimetry (PIV) measurements are performed. By comparing the experimental results with artificial disturbances with those under the natural condition (without artificial disturbances), the present paper shows that the second-mode instability waves are significantly stimulated by the artificial disturbances, and the boundary layer transition is effectively triggered.

Key words

hypersonic boundary layer transition control glowing discharge 

Nomenclature

T0

total temperature, K

p0

total pressure, Pa

U

free-stream velocity, m/s

Re

unit Reynolds number, m-1

x

streamwise location from the leading edge, mm

y

wall normal coordinate, mm

f

frequency, Hz

α

normalized streamwise wavenumber

β

normalized spanwise wavenumber

ω

normalized frequency

ψ

propagation angle of the eigenmode, (°)

U

velocity amplitude of the eigenmode wave, m/s

cr

phase velocity of the eigenmode, m/s

δ

thickness of the boundary layer, mm.

Chinese Library Classification

O354.4 

2010 Mathematics Subject Classification

76K05 

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Copyright information

© Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory for Turbulence and Complex SystemsPeking UniversityBeijingChina
  2. 2.Department of Aeronautics and Astronautics, College of EngineeringPeking UniversityBeijingChina

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