TY - JOUR

T1 - Numerical Study of the Evolution of Disturbances Generated by Roughness Elements in a Supersonic Boundary Layer on a Blunted Cone

AU - Khotyanovsky, D. V.

AU - Kirilovskiy, S. V.

AU - Poplavskaya, T. V.

AU - Kudryavtsev, A. N.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - 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.

AB - 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.

KW - blunted conical body

KW - direct numerical simulation

KW - distributed roughness

KW - isolated roughness elements

KW - laminar-turbulent transition

KW - supersonic boundary layer

KW - TRANSITION

KW - INSTABILITY

KW - STABILITY

KW - FLOW

UR - http://www.scopus.com/inward/record.url?scp=85073646632&partnerID=8YFLogxK

UR - https://www.elibrary.ru/item.asp?id=41697653

U2 - 10.1134/S0021894419030052

DO - 10.1134/S0021894419030052

M3 - Article

AN - SCOPUS:85073646632

VL - 60

SP - 438

EP - 450

JO - Journal of Applied Mechanics and Technical Physics

JF - Journal of Applied Mechanics and Technical Physics

SN - 0021-8944

IS - 3

ER -