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- Chernoray, Valery, 1975, et al.
(författare)
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Riblet-assisted control of transformation of the Λ-structure into a turbulent spot
- 2005
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Ingår i: Thermophysics and Aeromechanics. - 0869-8643. ; 12:4, s. 539-548
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Tidskriftsartikel (refereegranskat)abstract
- Experimental results are presented on transformation of a solitary Λ-structure into a turbulent spot and control of this process by means of riblets on the wetted surface in the boundary layer on a flat plate. It is shown that riblets exert a stabilizing effect on transformation of the Λ-structure into a turbulent spot. The Λ-structure on a smooth surface is shown to stretch in the streamwise direction and transform into a hairpin vortex, which becomes a turbulent spot further downstream. The intensity of the Λ-structure on riblets first increases and then decays further downstream, reaching less than half its value on a smooth surface. Finally, the Λ-structure decays on riblets without forming a turbulent spot.
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