Talks and Poster Presentations (with Proceedings-Entry):
S. Scheichl, A. Kluwick, S. Braun:
"On higher order effects in marginally separated flows";
Talk: GAMM 2011,
Graz, Austria;
2011-04-18
- 2011-04-21; in: "Proceedings of the annual GAMM meeting",
PAMM,
11/1
(2011),
ISSN: 1617-7061;
587
- 588.
English abstract:
If the angle of attack α of a slender airfoil reaches a critical value αs flow separation is known to occur at the upper surface. Further increase of α initially leads to the formation of a short laminar separation bubble which has an extremely weak influence on the external flow field - a phenomenon known as marginal separation - but then rather rapidly causes a severe change of the flow behaviour, leading to leading edge stall. According to the asymptotic theory of marginal separation holding in the limit of large Reynolds numbers Re → ∞, the flow in the neighbourhood of the separation bubble is governed by an integro-differential equation. This so-called interaction equation contains a single controlling parameter Γ which relates the angle of attack to the Reynolds number, with a value Γs corresponding to αs. Some recent results concerning higher order corrections to this theory and their effect on the stability of steady solutions will be presented.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1002/pamm.201110283
Created from the Publication Database of the Vienna University of Technology.