Nature’s Wind Turbines: The Measured Aerodynamic Efficiency of Spinning Seeds Approaches Theoretical Limits [PDF]
Biomimetics, 2022 This paper describe a procedure to measure experimentally the power coefficient, Cp, of winged seeds, and apply this technique to seeds from the Norway maple (Acer platanoides). We measure Cp=56.9±2% at a tip speed ratio of 3.21±0.06.
Timothy C. A. Molteno
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Aerodynamic efficiency of a bioinspired flapping wing rotor at low Reynolds number [PDF]
Royal Society Open Science, 2018 This study investigates the aerodynamic efficiency of a bioinspired flapping wing rotor kinematics which combines an active vertical flapping motion and a passive horizontal rotation induced by aerodynamic thrust.
H. Li, S. Guo
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Solar UAVs—More Aerodynamic Efficiency or More Electrical Power?
Energies, 2023 Solar UAVs (unmanned aerial vehicles) have experienced important development in recent years. The use of solar free energy is not neglected in the present energy crisis, with the intention to move toward green energies.
Liviu Dinca +2 more
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Aerodynamic Efficiency Improvement on a NACA-8412 Airfoil via Active Flow Control Implementation
Applied Sciences, 2022 The present paper introduces a parametric optimization of several Active Flow Control (AFC) parameters applied to a NACA-8412 airfoil at a single post-stall Angle of Attack (AoA) of 15∘ and Reynolds number Re = 68.5×103. The aim is to enhance the airfoil
Nil Couto, Josep M. Bergada
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Analyzing Porpoising on High Downforce Race Cars: Causes and Possible Setup Adjustments to Avoid It
Energies, 2022 The so-called porpoising is a well-known problem similar to bouncing that is affecting the dynamic behavior of basically all the field of 2022 Formula 1 racing cars.
Marco Gadola +3 more
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Numerical and Experimental Study of a Wing Combined with Wing Grids in Low Reynolds Number Flows [PDF]
مهندسی مکانیک شریف, 2022 One of the reasons for the increase in induced drag is the vortices created at the wing tip, which has a significant effect on reducing aerodynamic efficiency.
M. sadeghi Malekabadi, A. Banazadeh
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Aerodynamic Performance Estimation of Camber Morphing Airfoils for Small Unmanned Aerial Vehicle [PDF]
Journal of Aerospace Technology and Management, 2020 This paper proposes a methodology to harvest the benefits of camber morphing airfoils for small unmanned aerial vehicle (SUAV) applications. Camber morphing using discrete elements was used to morph the base airfoil, which was split into two, three, and ...
T Rajesh Senthil Kumar +3 more
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Aerodynamic Characteristics of Shark Scale-Based Vortex Generators upon Symmetrical Airfoil
Energies, 2021 A series of wind tunnel tests were carried out to determine the effect of shark scale-based vortex generators (SSVG) on a NACA 0015 symmetrical airfoil’s aerodynamic characteristics.
S. Arunvinthan +5 more
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Effects of Static Stability Margin on Aerodynamic Design Optimization of Truss-Braced Wing Aircraft
Aerospace, 2023 Currently, the aviation industry is facing an oil and energy crisis and is contributing much more greenhouse gas emissions to the environment. Aircraft design approaches, such as aerodynamic shape optimization, new configuration concepts, and active ...
Li Li +3 more
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Research on Wind Tunnel Test of Aerodynamic Characteristics of Missile under Subtransonic Velocity
Hangkong gongcheng jinzhan, 2020 In the process of missile design, the aerodynamic characteristics of missile as an important factor directly affect the dynamic quality of missile flight. In the case of severe nonlinearity of aerodynamic characteristics in subsonic and transonic regions,
PENG Bo, CEN Mengxi
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