Experimental investigations on biologically inspired airfoils for MAV applications

Tamai, Masatoshi

doi:10.31274/rtd-180813-16017

Cited by 4 publications

(8 citation statements)

References 8 publications

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“…The PIV measurements for this study were conducted only for the chord Reynolds number Re c = 58,000. However, very similar results were found in the work by Tamai [12] at the chord Reynolds number Re c = 34,000. The study by Tamai Due to the potential application to MAVs, flapping wing configurations has once more become a driving research topic in the aeronautic/aerodynamic community within the last few years.…”

Section: Resultssupporting

confidence: 88%

“…More closely related to the current study, Tamai [12] conducted a quantitative study of the flow field around a dragonfly airfoil extracted from the study by Kesel…”

Section: List Of Figuresmentioning

confidence: 99%

“…The experimental airfoils to be tested were selected from the previous work of Tamai [12]. The flat plate and corrugated dragonfly airfoil descend directly from the study, and the remaining comparison airfoil is again the corrugated dragonfly airfoil however wrapped tautly with paper to produce a smooth surfaced airfoil with identical airfoil characteristics (chord length, maximum thickness, etc…) and corresponding to the streamlines of the flow over the original corrugated dragonfly airfoil.…”

Section: Experimental Setup For the Dragonfly Airfoil Experimentsmentioning

confidence: 99%

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Experimental investigation of biomimetic wing configurations for Micro Air Vehicle applications

Murphy¹

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Section: Resultssupporting

confidence: 88%

“…More closely related to the current study, Tamai [12] conducted a quantitative study of the flow field around a dragonfly airfoil extracted from the study by Kesel…”

Section: List Of Figuresmentioning

confidence: 99%

Section: Experimental Setup For the Dragonfly Airfoil Experimentsmentioning

confidence: 99%

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Experimental investigation of biomimetic wing configurations for Micro Air Vehicle applications

Murphy¹

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“…Table 1 gives the design parameters of the studied airfoils. Further information about the geometry design and manufacturing process of the rigid-and flexible-membrane airfoils is available in [21].…”

Section: Studied Airfoils and Experimental Setupmentioning

confidence: 99%

Flexible-Membrane Airfoils at Low Reynolds Numbers

Tamai

Murphy

2008

Journal of Aircraft

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An experimental study was conducted to assess the benefits of using flexible-membrane airfoils/wings at low Reynolds numbers for micro air vehicle applications compared with using a conventional rigid airfoil/wing. In addition to measuring aerodynamic forces acting on flexible-membrane airfoils/wings, a high-resolution particle image velocimetry system was used to conduct flowfield measurements to quantify the transient behavior of vortex and turbulent flow structures around the flexible-membrane airfoils/wings to elucidate the associated underlying fundamental physics. The aerodynamic force measurements revealed that flexible-membrane airfoils could provide better aerodynamic performance compared with their rigid counterpart at low Reynolds numbers. The flexibility (or rigidity) of the membrane skins of the airfoils was found to greatly affect their aerodynamic performance. Particle image velocimetry measurements elucidated that flexible-membrane airfoils could change their camber (i.e., crosssectional shape) automatically to adapt incoming flows to balance the pressure differences on the upper and lower surfaces of the airfoils, therefore suppressing flow separation on the airfoil upper surfaces. Meanwhile, deformation of the flexible-membrane skins was found to cause significant airfoil trailing-edge deflection (i.e., lift the airfoil trailing edge up from its original designed position), which resulted in a reduction of the effective angles of attack of the flexible-membrane airfoils, thereby delaying airfoil stall at high angles of attack. The nonuniform spanwise deformation of the flexible-membrane skins of the flexible-membrane airfoils was found to significantly affect the characteristics of vortex and turbulent flow structures around the flexible-membrane airfoils.

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“…Table 1 shows the design parameters of the test airfoils. Further information about the geometry design and manufacturing process of the rigid and flexible membrane airfoils is available at Tamai (2007).…”

Section: Studied Airfoils and Experimental Setupmentioning

confidence: 99%

An Experimental Study of Flexible Membrane Airfoils at Low Reynolds Numbers

Tamai

Murphy

2008

46th AIAA Aerospace Sciences Meeting and Exhibit

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An experimental study was conducted to explore the benefits of using flexible membrane airfoils/wings at low Reynolds numbers for MAV applications. In addition to measuring aerodynamic forces acting on the flexible membrane airfoils/wings, a high-resolution Particle Image Velocimetry (PIV) system was used to conduct flow field measurements to quantify the transient behavior of vortex and turbulent flow structures around the flexible membrane airfoils/wings at different angles of attack. The force measurement results revealed that flexible membrane airfoils can provide better aerodynamic performance compared with their rigid counterpart at low Reynolds numbers. The flexibility (or rigidity) of the membrane skins was found to affect the aerodynamic performance of the membrane airfoils significantly. The PIV measurements elucidated that flexible membrane airfoils changed their camber (i.e., cross sectional shape) automatically to adapt incoming flows to balance the pressure differences applied on the upper and lower surfaces of the airfoils at different angles of attack, thereby suppressing flow separation on the membrane airfoils. The deformation of the flexible membrane airfoils also reduced the effective angle of attack of the airfoils to delay airfoil stall.

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Experimental investigations on biologically inspired airfoils for MAV applications

Cited by 4 publications

References 8 publications

Experimental investigation of biomimetic wing configurations for Micro Air Vehicle applications

Experimental investigation of biomimetic wing configurations for Micro Air Vehicle applications

Flexible-Membrane Airfoils at Low Reynolds Numbers

An Experimental Study of Flexible Membrane Airfoils at Low Reynolds Numbers

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