Role of localized streamwise structures in the process of transition to turbulence in boundary layers and jets (review)
V. V. Kozlov, G. R. Grek, L. L. Lofdahl',* V. G. Chernorai* and M. V. Litvinenko*
Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090;
*Chalmers University of Technology, S-412 96 Gothenburg, Sweden
Pages: 224-236
Abstract
Results of the analysis of specific
features of the laminar–turbulent
transition in various subsonic shear
flows, which are caused by localized
stationary and nonstationary streamwise
structures, are presented. One mechanism
of flow turbulization is considered,
which involves the origination and
development of secondary high-frequency
disturbances in regions of flow
instability generated by its modulation
by streamwise structures. It is shown
that this process is identical in
different types of shear flows (boundary
layers and jets) and in flows of the
type of localized streamwise structures
(stationary or nonstationary).
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