Numerical Study of the Evolution of Disturbances Generated by Roughness Elements in a Supersonic Boundary Layer on a Blunted Cone

D. V. Khotyanovsky, S. V. Kirilovskiy, T. V. Poplavskaya, A. N. Kudryavtsev

Research output: Contribution to journalArticlepeer-review

Abstract

Results of direct numerical simulations of the roughness-induced development of instability and transition to turbulence in a supersonic boundary layer on a blunted cone for the free-stream Mach number M = 5.95 are presented. The flow parameters and model geometry are consistent with the conditions of the experiments performed in the study. The following roughness types are considered: random distributed roughness, isolated roughness elements of different shapes, and a group of regularly arranged roughness elements. The processes of the instability development and transition for different roughness types are compared, and possible mechanisms of the roughness influence on the stability of boundary layers on blunt bodies are discussed.

Original languageEnglish
Pages (from-to)438-450
Number of pages13
JournalJournal of Applied Mechanics and Technical Physics
Volume60
Issue number3
DOIs
Publication statusPublished - 1 May 2019

Keywords

  • blunted conical body
  • direct numerical simulation
  • distributed roughness
  • isolated roughness elements
  • laminar-turbulent transition
  • supersonic boundary layer
  • TRANSITION
  • INSTABILITY
  • STABILITY
  • FLOW

State classification of scientific and technological information

  • 30 MECHANICS

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