Investigation of the effect of the wall roughness and free stream turbulence on the boundary layer development

0323101 - ÚT 2010 RIV DE eng J - Journal Article
Jonáš, Pavel - Mazur, Oton - Uruba, Václav
Investigation of the effect of the wall roughness and free stream turbulence on the boundary layer development.
[Výzkum vlivu drsnosti povrchu a turbulence nabíhajícího proudu na vývoj mezní vrstvy.]
Proceedings in Applied Mathematics and Mechanics. Roč. 8, č. 1 (2008), s. 10615-10616. ISSN 1617-7061
R&D Projects: GA AV ČR(CZ) IAA200760614
Institutional research plan: CEZ:AV0Z20760514
Keywords : boundary layer * transition to turbulence * wall roughness
Subject RIV: BK - Fluid Dynamics
http://www3.interscience.wiley.com/journal/91016652/home

Development of a flat plate boundary layer (grad P = 0) was investigated in the closed type wind tunnel (0.5 x 0.9 x 2.7 m3). The plate was either aerodynamically smooth or covered with a thin plate (10 mm thick) with the surface made from the sand paper (grits 80). FST is generated by square mesh plane grids/screens set across the flow as to produce homogeneous, close to isotropy turbulence with various scales of velocity and length. The surface roughness was of transient type. The comparison is made of the effect of various grouping of the wall roughness and FST on the boundary layer development.

je zkoumán vývoj mezní vrstvy na desce bez přítomnosti gradientu tlaku. Deska je buďto aerodynamicky hladká nebo má drsný povrch (brusný papír 80), ve vnějším nabíhajícím proudu jsou poruchy. Je ukázán vliv různých kombinací intenzity turbulence nabíhajícího proudu a drsnosti povrchu.
Permanent Link: http://hdl.handle.net/11104/0171163