Experimental Study of the Structure of a Wingtip Vortex
Title | Experimental Study of the Structure of a Wingtip Vortex PDF eBook |
Author | National Aeronautics and Space Administration (NASA) |
Publisher | Createspace Independent Publishing Platform |
Pages | 64 |
Release | 2018-05-31 |
Genre | |
ISBN | 9781720518587 |
A complete look at the near-field development and subsequent role-up of a wingtip vortex from a NACA 0015 wing section is investigated. Two separate but equally important surveys of the vortex structure in the region adjacent to the wingtip and approximately one chord length downstream of the trailing edge are performed. The two surveys provide qualitative flow-visualization an quantitative velocity measurement data. The near-field development and subsequent role-up of the vortex structures is strongly influenced by the angle-of-attack and the end-cap treatment of the wing section. The velocity field near the wingtip of the NACA 0015 wing section was measured with a triple-sensor hot wire probe and compared to flow visualization images produced with titanium tetrachloride smoke injection and laser illumination. The flat end-cap results indicate the formation of multiple, relatively strong vortex structures as opposed to the formation of a single vortex produced with the round end-cap. The multiple vortices generated by the flat end-cap are seen to rotate around a common ce te in a helical pattern until they eventually merge into a single vortex. Compared to a non-dimensional loading parameter, the results of the velocity and flow visualization data shows a "jetlike" axial velocity profile for loading parameter values on the order of 0.1 and a "wakelike" profile for much lower loading parameter values.Anderson, Elgin A. and Wright, Christopher T.Langley Research CenterWING TIPS; VORTICES; SUBSONIC WIND TUNNELS; AERODYNAMIC CONFIGURATIONS; AERODYNAMIC CHARACTERISTICS; FLOW VISUALIZATION; ANGLE OF ATTACK; TRAILING EDGES; VELOCITY DISTRIBUTION
Experimental Study of the Structure of Thw Wing-tip Vortex
Title | Experimental Study of the Structure of Thw Wing-tip Vortex PDF eBook |
Author | E. A. Anderson |
Publisher | |
Pages | |
Release | 2000 |
Genre | |
ISBN |
Experimental Study on the Near Field Structure of Wing-tip Vortex
Title | Experimental Study on the Near Field Structure of Wing-tip Vortex PDF eBook |
Author | Sejong Oh |
Publisher | |
Pages | |
Release | 2000 |
Genre | |
ISBN |
Experimental Study of a Wing Tip Vortex with Tip Blowing
Title | Experimental Study of a Wing Tip Vortex with Tip Blowing PDF eBook |
Author | Jason R. Bettle |
Publisher | |
Pages | 354 |
Release | 2004 |
Genre | Airplanes |
ISBN |
An Experimental Study of Axial Flow in Wing Tip Vortices
Title | An Experimental Study of Axial Flow in Wing Tip Vortices PDF eBook |
Author | D. H. Thompson |
Publisher | |
Pages | |
Release | 1975 |
Genre | |
ISBN |
Experimental Investigation of the Structure of Vortices in Simple Cylindrical Vortex Chambers
Title | Experimental Investigation of the Structure of Vortices in Simple Cylindrical Vortex Chambers PDF eBook |
Author | Coleman DuP. Donaldson |
Publisher | |
Pages | 68 |
Release | 1962 |
Genre | |
ISBN |
Experimental Study of Vortex Structure in a Plane Mixing Layer
Title | Experimental Study of Vortex Structure in a Plane Mixing Layer PDF eBook |
Author | Sanjay Vinayak Sherikar |
Publisher | |
Pages | 214 |
Release | 1987 |
Genre | Fluid dynamics |
ISBN |