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Effect of riblets on nonlinear disturbances in the boundary layer

Authors
  • Chernorai, V. G.1
  • Kozlov, V. V.2
  • Loefdahl, L. L.1
  • Grek, G. R.2
  • Chun, H. H.3
  • 1 Chalmers University of Technology, Goeteborg, Sweden , Goeteborg (Sweden)
  • 2 Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia , Novosibirsk (Russia)
  • 3 Pusan National University, Pusan, South Korea , Pusan (South Korea)
Type
Published Article
Journal
Thermophysics and Aeromechanics
Publisher
Nauka/Interperiodica
Publication Date
Jan 01, 2006
Volume
13
Issue
1
Pages
67–74
Identifiers
DOI: 10.1134/S1531869906010072
Source
Springer Nature
Keywords
License
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Abstract

Results of experimental investigations of the nonlinear stage of sinusoidal and varicose instability of a streaky structure, which leads to multiplication of streaky structures and origination of coherent structures (such as Λ-structures), are presented. Riblets suppress the intensity of streaky structures, stabilize the flow against the development of the secondary high-frequency instability of streaky structures, and, for this reason, delay spatial turbulization of the flow. The results of these investigations can be useful for understanding the flow structure in such situations and for possible controlling of the coherent structures aimed at flow stabilization.

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