The impact of the pitching motion on the structure of the vortical flow over a slender delta wing under sideslip angle

• Published in: Journal of visualization 2021-06, Vol.24 (3), p.437-442
• Main Authors: Tasci, Mehmet Oguz, Pektas, Mehmet Can, Tumse, Sergen, Karasu, Ilyas, Sahin, Besir, Akilli, Huseyin
• Format: Article
• Language: English
• Subjects: Angle of attack; Bursting; Classical and Continuum Physics; Computer Imaging; Delta wings; Engineering; Engineering Fluid Dynamics; Engineering Thermodynamics; Flow characteristics; Fluid dynamics; Fluid flow; Heat and Mass Transfer; Pattern Recognition and Graphics; Pitching motion; Short Paper; Sideslip; Sweep angle; Vision
• ISSN: 1343-8875; 1875-8975
• DOI: 10.1007/s12650-020-00720-4

The primary purpose of this investigation is to observe the effect of the pitching motion on the vortical flow structure and bursting of leading-edge vortices over a delta wing under the sideslip angle, β using a dye visualization technique. In the current work, a delta wing with a sweep angle of Λ  = 70° was oscillated in upstroke and downstroke direction to be able to discover the influence of pitching motion on the flow characteristics of the delta wing. The values of mean angles of attack were selected as α m  = 25° and α m  = 35°, and the sideslip angle was altered from β  = 0 to 16°. The delta wing oscillated with the various periods of T e  = 5 s, 20 s, and 60 s, respectively. Amplitude of motion was adjusted as α o  =  ± 5°. It is found that the pitching motion of the delta wing under the sideslip angle β varies the location of the vortex bursting and vortical flow structure substantially.