Flow Visualization in the Wake of the Flapping-Wing MAV ’DelFly II’ in Forward Flight

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2012-06-25

Author

Perçin, Mustafa
van Oudheusden, Bas W.
Remes, Bart
Ruijsink, R
de Wagter, C

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Time-resolved velocity field measurements in the wake of the flapping wings of the DelFly II Micro Aerial Vehicle (MAV) in forward flight configuration were obtained by Stereoscopic Particle Image Velocimetry (Stereo-PIV). The PIV measurements were performed at several spanwise planes in the wake of the flapping wings and at a high framing rate to allow a reconstruction of the temporal development of the three dimensional wake structures throughout the flapping cycle. The wake reconstruction was performed by interpolating between the measurement planes through a Kriging interpolation procedure. First, the general wake topology of the DelFly II model is described in conjunction with the behavior of the distinctive flow structures, in particular, tip vortex, trailing edge vortex, and root vortex. Second, the effect of reduced frequency is investigated by changing the flapping frequency. Comparison of the three dimensional wake structures for different cases of reduced frequency reveals major differences in both formation and interaction of vortical structures.

URI

https://hdl.handle.net/11511/37071

DOI

https://doi.org/10.2514/6.2012-2664

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Department of Aerospace Engineering, Conference / Seminar

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Wake reconstruction of flapping-wing MAV DelFly II in forward flight Perçin, Mustafa; De Baar, J H S; Van Oudheusden, Bas W.; Remes, Bart; Ruijsink, R; De Wagter, C (2012-06-03) Time-resolved velocity field measurements in the wake of the flapping wings of the DelFly II Micro Aerial Vehicle (MAV) in forward flight configuration were obtained by Stereoscopic Particle Image Velocimetry (Stereo-PIV). The PIV measurements were performed at several spanwise planes in the wake of the flapping wings and at a high framing rate to allow a reconstruction of the temporal development of the three dimensional wake structures throughout the flapping cycle. The wake reconstruction was performed b...
Flow Structures Around a Flapping-Wing Micro Air Vehicle Performing a Clap-and-Peel Motion Perçin, Mustafa; Remes, Bart (2017-04-01) The vortical flow structures generated by the flapping wings of the DelFly II micro air vehicle in hovering flight configuration are investigated using particle image velocimetry. Synchronous force measurements are carried out to establish the relation between the unsteady forces and force generation mechanisms: particularly, the leading-edge vortex and the clap-and-peel motion. The formation of conical leading-edge vortices on both wings is revealed, which occurs rapidly at the start of the outstroke as a ...
Three-dimensional vortex wake structure of a flapping-wing micro aerial vehicle in forward flight configuration Perçin, Mustafa; Eisma, H. E.; Remes, B. D. W. (2014-09-01) This paper investigates the formation and evolution of the unsteady three-dimensional wake structures generated by the flapping wings of the DelFly II micro aerial vehicle in forward flight configuration. Time-resolved stereoscopic particle image velocimetry (Stereo-PIV) measurements were carried out at several spanwise-aligned planes in the wake, so as to allow a reconstruction of the temporal development of the wake of the flapping wings throughout the complete flapping cycle. Simultaneous thrust-force me...
Vortex Formation and Force Generation Mechanisms of the DelFly II in Hovering Flight Tenaglia, A; Perçin, Mustafa; Van Oudheusden, Bas W.; Deng, Shuanghou; Remes, Bart (2014-08-12) This paper addresses the unsteady aerodynamic mechanisms in the hovering flight of the DelFly II flapping-wing Micro Aerial Vehicle (MAV). Stereoscopic Particle Image Velocimetry (Stereo-PIV) were carried out around the wings at a high framing rate. Thrust-force was measured to investigate the relation between the vortex dynamics and the aerodynamic force generation. The results reveal that the Leading-Edge-Vortex (LEV), as well as the high flexibility of the wings, have a major effect on thrust generation....
Flow Visualization around a Flapping-Wing Micro Air Vehicle in Free Flight Using Large-Scale PIV Herrero, Alejandro del Estal; Perçin, Mustafa; Karasek, Matej; van Oudheusden, Bas (2018-12-01) Flow visualizations have been performed on a free flying, flapping-wing micro air vehicle (MAV), using a large-scale particle image velocimetry (PIV) approach. The PIV method involves the use of helium-filled soap bubbles (HFSB) as tracer particles. HFSB scatter light with much higher intensity than regular seeding particles, comparable to that reflected off the flexible flapping wings. This enables flow field visualization to be achieved close to the flapping wings, in contrast to previous PIV experiments ...

Citation Formats

M. Perçin, B. W. van Oudheusden, B. Remes, R. Ruijsink, and C. de Wagter, “Flow Visualization in the Wake of the Flapping-Wing MAV ’DelFly II’ in Forward Flight,” 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37071.