EFFECT OF VERTICAL TRANSLATION ON UNSTEADYAERODYNAMICS OF A HOVERING AIRFOIL

2010-06-17
Gunaydınoglu, Erkan
Kurtuluş, Dilek Funda
In this study, the unsteady aerodynamics of SD7003 airfoil undergoing “figure-of-eight” motions with vertical translation amplitudes of 0c (normal hover), 0.5c and 1c is investigated numerically. The forces and vortex fields are compared at the same Reynolds number that is defined with respect to the maximum absolute velocity. Also the effect of the reduced frequency is investigated and it is found that in the meantime, decreasing reduced frequency and increasing Reynolds number does not alter the general force and vortex-field trends but increases the peaks in the aerodynamic forces for same motion.

Suggestions

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...
Effect of thickness-to-chord ratio on aerodynamics of non-slender delta wing
Ghazijahani, Mohammad Sharifi; Yavuz, Mehmet Metin (2019-05-01)
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 ...
Effect of forward velocity on rectangular wings flapping with piezoelectric actuators
Çömez, Fadile Yudum; Kurtuluş, Dilek Funda (null; 2018-07-11)
In the current study, unsteady aerodynamic forces of two flapping rectangular wings are investigated using two different materials namely, aluminum and plexigla ss. Two different materials used for the wings are intended to observe the effects of the wing flexibility on instantaneous aerodynamic forces. A Lead Zirconate Titanate (PZT) piezoelectric actuator is used for flapping the wing models. The wind tunnel tests are performed with velocities ranging from 0m/s to 12 m/s. Output flapping frequencies are m...
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 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 ...
Citation Formats
E. Gunaydınoglu and D. F. Kurtuluş, “EFFECT OF VERTICAL TRANSLATION ON UNSTEADYAERODYNAMICS OF A HOVERING AIRFOIL,” 2010, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/76475.