Control of flow structure on nonslender delta wing using passive bleeding: effects of orientation, angle, and solidity ratio

Date

2018-11-18

Author

Yavuz, Mehmet Metin
Kestel, Kayacan

Metadata

Show full item record

Item Usage Stats

151
views

0
downloads

Recently, we have demonstrated that the bleeding, which utilizes passages inside the wing to allow the fluid flowing from the pressure side to the suction side by using inherent pressure difference, could be used as an effective flow control method for nonslender delta wings. In the present study, this technique is investigated in detail for nonslender delta wings of 35 and 45-degree sweep angles in a low speed wind tunnel using smoke visualization, particle image velocimetry, and surface pressure measurements for broad ranges of angle of attack and Reynolds number. The effects of bleeding orientation, angle, and solidity ratio on flow structure are quantified in particular, where the solidity ratio signifies the level of bleed gap on the wing surface. The results indicate that the recovery of the leading-edge vortex with significant increases in the suction pressure coefficient, −Cp, along with the elimination of large-scale swirl pattern in near surface streamline topology are achieved with the proper bleeding configuration. Considering the effectiveness, the bleeding orientation and the solidity ratio are quite critical to achieve the successful flow control where the angles need to be adjusted according to the angle of attack of the wing to reach the utmost influence.

URI

https://hdl.handle.net/11511/82892

DOI

https://doi.org/10.1016/j.ast.2020.106136

Conference Name

71st Annual Meeting of the APS Division of Fluid Dynamics (18 - 20 Kasım 2018)

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Control of Flow Structure on Non Slender Delta Wing Bio inspired Edge Modifications Passive Bleeding and Pulsed Blowing Yavuz, Mehmet Metin; Çetin, Cenk (null; 2016-11-22) In the present study, different flow control approaches including bio-inspired edge modifications, passive bleeding, and pulsed blowing are introduced and applied for the flow over non-slender delta wing. Experiments are conducted in a low speed wind tunnel for a 45 degree swept delta wing using qualitative and quantitative measurement techniques including laser illuminated smoke visualization, particle image velocimety (PIV), and surface pressure measurements. For the bio-inspired edge modifications, the e...
Determination of critical submergence depth at horizontal intakes under asymmetric flow conditions Göğüş, Mustafa; Köken, Mete; Haspolat, Emre (2015-07-03) The purpose of the present study is to investigate the hydraulic conditions of air-entraining vortices under asymmetrical flow conditions and derive a general expression to determine the critical submergence depth required for the formation of these vortices at horizontal intake pipes. A series of experiments were conducted in a model composed of a concrete reservoir and intake pipe which was mounted horizontally to the reservoir. Three pipes of different diameters were tested with adjustable plexiglass sid...
Control of Flow Structure over a Nonslender Delta Wing Using Periodic Blowing Cetin, Cenk; Celik, Alper; Yavuz, Mehmet Metin (2018-01-01) The effect of unsteady blowing through the leading edge on the flow structure over a 45 deg swept delta wing in relation to the steady blowing is experimentally studied in a low-speed wind tunnel using the techniques of surface-pressure measurements, particle image velocimetry, and laser-illuminated smoke visualization. The unsteady blowing in the form of a periodic square pattern at 25% duty cycle is provided at the excitation frequencies varying from 2 to 24 Hz for a fixed momentum coefficient. The flow s...
Convergence, stability, and numerical solution of unsteady free convection magnetohydrodynamical flow between two slipping plates Arslan, Sinem (2021-09-01) In this study, the unsteady free convection magnetohydrodynamical flow of a viscous, incompressible, and electrically conducting fluid between two horizontally directed slipping plates is considered. The external magnetic filed is applied uniformly in the y-direction and the fluid is assumed to be of low conductivity so that the induced magnetic field is negligible. So the relevant variables, that is, the velocity and the temperature, depend only on one coordinate, the y-axis. The governing equations of vel...
Effect of ground on aerodynamics and longitudinal static stability of a non-slender delta wing Koçak, Göktuğ; Yavuz, Mehmet Metin (2022-11-01) © 2022 Elsevier Masson SASIn this paper, the effect of ground on aerodynamics and longitudinal static stability of a non-slender delta wing with sweep angle of 45 degree and thickness-to-chord ratio (t/c) of 5.9% was characterized at Reynolds number of 9×104 in a low-speed wind tunnel using force and pressure measurements. The measurements were conducted for angles of attack varying between 0≤α≤30 degrees and non-dimensional heights between 3%≤h/c≤107% and height stability of the wing based on aerodynamic c...

Citation Formats

M. M. Yavuz and K. Kestel, “Control of flow structure on nonslender delta wing using passive bleeding: effects of orientation, angle, and solidity ratio,” Atlanta, Georgia, 2018, vol. 63, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/82892.