Flat Plate Boundary Layer Transition Affected by the External Turbulence and Surface Roughness

0352480 - ÚT 2011 RIV DE eng A - Abstrakt
Hladík, Ondřej - Jonáš, Pavel - Mazur, Oton - Uruba, Václav
Flat Plate Boundary Layer Transition Affected by the External Turbulence and Surface Roughness.
81st annual meeting of the international association of applied mathematics and mechanics. Karlsruhe, 2010. s. 9-9. ISBN N.
[GAMM annual meeting 2010 /81./. 22.03.2010-26.03.2010, Karlsruhe]
Grant CEP: GA ČR GA101/08/1112; GA ČR GAP101/10/1230
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: boundary layer transition * external turbulence * surface roughness
Kód oboru RIV: BK - Mechanika tekutin

The joint action of the external ow turbulence (with intensities from 0.003 up to 0.05 and length scales from 0.002 m up to 0.031 m) and the surface roughness (caused by sandpaper with grids 60, 80 and 100 respectively) on the at plate boundary layer transition is investigated and compared with the by-pass transition on the smooth surface at identical boundary conditions. The existence of the laminar/transitional region and the action of external turbulence were proved regardless the surface roughness.
Trvalý link: http://hdl.handle.net/11104/0191980