Volume 5, Juin 2013Progress in Flight Physics
|Page(s)||583 - 600|
|Section||Chapter Nine. Configuration aerodynamics, sonic boom, and aircraft aerodynamic model|
|Published online||14 June 2013|
Experimental research of the boundary layer structure at near-critical angles of attack for the classical and wavy wings
Khristianovich Institute of Theoretical and Applied Mechanics Siberian Branch of the Russian Academy of Sciences 4/1 Institutskaya Str., Novosibirsk, Russia
The structure of the boundary layer on the classical and wavy wings at near-critical angles of attack at the Reynolds number Re = 140,000 is studied with the use of oil-film and infrared (IR) visualization. A boundary layer with a specific structure is demonstrated to form on the wing with the wavy surface. This boundary layer is more stable to separation from the wing surface. As a result, the wing with a wavy surface has a greater critical angle of attack and a greater maximum lift coefficient. Improvement of aerodynamic characteristics of the wavy wing, as compared with the classical wing, is confirmed by balance measurements.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.