SURFACE ROUGHNESS AND EXTERNAL FLOW TURBULENCE JOINT EFFECT ON TURBULENT BOUNDARY LAYER

0326654 - ÚT 2010 RIV CZ eng C - Conference Paper (international conference)
Jonáš, Pavel - Mazur, Oton - Uruba, Václav
SURFACE ROUGHNESS AND EXTERNAL FLOW TURBULENCE JOINT EFFECT ON TURBULENT BOUNDARY LAYER.
[Vliv drsnosti povrchu a vnější turbulence na turbulentní mezní vrstvu.]
Engineering Mechanics 2009. Praha: ÚTAM, 2009 - (Náprstek,, J.; Fischer, C.), s. 122-123. ISBN 978-80-86246-35-2.
[Engineering mechanics 2009. Svratka (CZ), 11.05.2009-14.05.2009]
R&D Projects: GA AV ČR(CZ) IAA200760614
Institutional research plan: CEZ:AV0Z20760514
Keywords : boundary layer * turbulence * surface roughness
Subject RIV: BK - Fluid Dynamics

The individual and joint effects of surface roughness and external flow turbulence on turbulent boundary layer were experimentally investigated in the closed circuit wind tunnel IT AS CR. Fundamental mean flow characteristics were measured in turbulent boundary layers either on a smooth plate or on the plate covered with the sandpaper (80- grits) under turbulent flow with the intensity of almost isotropic fluctuations from the natural value, of about 0.003 up to 0.05 and with the relevant length parameter from 2.2 mm up to 30.5 mm .

Vliv drsnosti povrchu a vnější turbulence je zkoumán odděleně i současně v cirkulačním tunelu ÚT. Jso měřeny základní charakteristiky mezní vrstvy na hladké stěně a na stěně pokryté smyrkovým papírem.
Permanent Link: http://hdl.handle.net/11104/0173690