A comment on the flat plate leading edge shape on laminar-turbulent transition

0452800 - ÚT 2016 CZ eng C - Konferenční příspěvek (zahraniční konf.)
Antoš, Pavel - Jonáš, Pavel - Procházka, Pavel P.
A comment on the flat plate leading edge shape on laminar-turbulent transition.
Experimental Fluid Mechanics 2015. Liberec: Polypress s.r.o, 2015 - (Dančová, P.; Veselý, M.), s. 32-37
[Experimental Fluid Mechanics 2015 /10./. Praha (CZ), 17.11.2015-20.11.2015]
Grant CEP: GA ČR GAP101/12/1271
Institucionální podpora: RVO:61388998
Klíčová slova: flat plate * laminar-turbulent transition * HW anemometry
Kód oboru RIV: BK - Mechanika tekutin

Laminar-turbulent transition region is investigated in zero pressure gradient boundary layers developing on flat plates with different shapes of leading edges namely with the elliptical profile; the superelliptical one and with the thin circle profile. The mean flow field characteristics are presented and discussed. Near downstream from the leading edge are mean velocity profiles very similar to the Blasius solution in all compared configurations. The dramatic effect of the leading edge is ascertained in the beginning of the skin friction coefficient deflection from the course after Blasius solution. The start of deflection is moving downstream in sequence: elliptic – super-elliptic – circle shape. The length of the transitional region shortens in the opposed sequence.
Trvalý link: http://hdl.handle.net/11104/0254866