Effect of thickness-to-chord ratio on aerodynamics of non-slender delta wing

Date

2019-05-01

Author

Ghazijahani, Mohammad Sharifi
Yavuz, Mehmet Metin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

215
views

0
downloads

The effect of thickness-to-chord (t/C) ratio on aerodynamics of a non-slender delta wing with sweep angle of 45 degree is characterized in a low-speed wind tunnel using laser illuminated smoke visualization, surface pressure measurements, particle image velocimetry, and force measurements. The delta wings of t/C ratios varying from 2% to 15% with 45 degree windward beveled leading edges are tested. The results indicate that the effect of t/C ratio on flow structure is quite substantial. Considering the low angles of attack where the wings experience leading edge vortex structure, the strength of the vortex structure increases as the t/C ratio increases. However, low t/C ratio wings have pronounced surface separations at higher angle of attack compared to the wings with high t/C ratios. These results are well supported by the force measurements such that high t/C ratio wings induce higher lift coefficients, C-L, at low angles of attack, whereas maximum C-L values are higher and appear at higher angle of attack for low t/C ratio wings. This indicates that low t/C ratio wings are more resistive to the stall condition. Considering the lift-to-drag ratio, C-L/C-D, increase in t/C ratio induces remarkable drop in C-L/C-D values. (C) 2019 Elsevier Masson SAS. All rights reserved.

Subject Keywords

Near-surface topology, Flow structure, Vortex flows

URI

https://hdl.handle.net/11511/32935

Journal

AEROSPACE SCIENCE AND TECHNOLOGY

DOI

https://doi.org/10.1016/j.ast.2019.03.033

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Effect of Thickness-to-Chord Ratio on Flow Structure of a Low Swept Delta Wing Gulsacan, Burak; Sencan, Gizem; Yavuz, Mehmet Metin (American Institute of Aeronautics and Astronautics (AIAA), 2018-12-01) The effect of thickness-to-chord (t/C) ratio on flow structure of a delta wing with sweep angle of 35 deg is characterized in a low-speed wind tunnel using laser-illuminated smoke visualization, particle image velocimetry, and surface pressure measurements. Four different t/C ratios varying from 4.75 to 19% are tested at angles of attack, 4, 6, 8, and 10 deg, for Reynolds numbers Re =1 x 10(4) and 3.5 x 10(4). The results indicate that the effect of thicknessto-chord ratio on flow structure is quite substan...
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...
Effect of Passive Bleeding on Flow Structure over a Nonslender Delta Wing Celik, Alper; Cetin, Cenk; Yavuz, Mehmet Metin (2017-08-01) The effect of passive bleeding on flow structure of a 45 deg swept delta wing is studied in a low-speed wind tunnel using techniques of laser-illuminated smoke visualization, surface-pressure measurements, and particle image velocimetry. Three different bleeding configurations are tested to identify the effectiveness of the control technique compared to a base planform for a broad range of attack angles 6 <= alpha <= 6deg at Reynolds numbers Re=3.5x10(4) and Re=10(5). The results indicate that all bleeding ...
Effect of thickness-to-chord ratio on flow structure of nonslender delta wing Gülsaçan, Burak; Ghazijahani, Mohammad Sharifi; Şencan, Gizem; Yavuz, Mehmet Metin (2018-11-18) The effects of thickness-to-chord (t/C) ratio on flow structures of nonslender delta wings with sweep angles of 35 and 45 degrees are characterized in a low-speed wind tunnel using velocity, pressure, and force measurements. The delta wings with t/C ratios varying from 2 % to 19 % are tested at broad ranges of attack angles and Reynolds numbers. The results indicate that the effect of t/C ratio on flow structure is quite substantial. Considering the low angles of attack where the wings experience leading ed...
Transformation of flow structure on a delta wing of moderate sweep angle during pitch-up maneuver Yavuz, Mehmet Metin (2012-08-01) The transformation of flow structure on a delta wing of moderate sweep angle is investigated during pitch-up via quantitative imaging in crossflow planes, in relation to qualitative dye visualization. The comparisons are made with the corresponding stationary wing. The effects of different pitch-up maneuver rates and Reynolds numbers on evolution of flow patterns are also addressed. A technique of high-image-density particle image velocimetry is employed for the quantitative analysis. The transformation of ...

Citation Formats

M. S. Ghazijahani and M. M. Yavuz, “Effect of thickness-to-chord ratio on aerodynamics of non-slender delta wing,” AEROSPACE SCIENCE AND TECHNOLOGY, pp. 298–307, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32935.