Results 151 to 160 of about 84,328 (206)

Bio-inspired helical pantograph arms for aerodynamic noise suppression in high-speed trains. [PDF]

iScience
Lou F, Xiao X, Zhang Z, Zhang J, Li X.
europepmc   +1 more source

Advanced blade profiles for improved efficiency in Savonius wind turbines: the aeroleaf case study. [PDF]

Sci Rep
Hosseinian SM, Mohseni M, Karimi MS.
europepmc   +1 more source

A comparative multi-objective investigation for metallic and non-metallic materials on the erosion resistance of wind turbine blade with performance evaluation. [PDF]

Sci Rep
Abou Taleb ASA, Abdelgaliel IH, Aly MF.
europepmc   +1 more source

Effects of strong parametric excitation on cantilever beam: non-perturbative approach. [PDF]

Sci Rep
Moatimid GM, Amer TS, Elagamy K.
europepmc   +1 more source

Trajectory simulation of multi-body parachute system for airdrop-capable UAVs based on fluid-structure interaction. [PDF]

PLoS One
Guo H, Gao Z, Zhu Z, Zhang M, Zhang J.
europepmc   +1 more source

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Smart Morphable Surfaces for Aerodynamic Drag Control

Advanced Materials, 2014
Smart Morphable Surfaces enable switchable and tunable aerodynamic drag reduction of bluff bodies. Their topography, resembling the morphology of golf balls, can be custom-generated through a wrinkling instability on a curved surface. Pneumatic actuation of these patterns results in the control of the drag coefficient of spherical samples by up to a ...
Terwagne, Denis, Brojan, Miha, Reis, Pedro M.   +2 more
openaire   +4 more sources

Aerodynamic Drag Prediction of Helicopter Fuselage

Journal of Aircraft, 2001
A summary of investigations into predictions of the aerodynamic drag of a modular helicopter fuselage (Eurocopter Dauphin DGV 200) is presented. Drag results are shown for two different configurations, Reynolds numbers up to 6 × 107 (flight conditions), with and without support structure of the wind-tunnel model.
Filippone, A., Michelsen, J. A.
openaire   +1 more source

Aerodynamic Drag and Drag Reduction

41st Aerospace Sciences Meeting and Exhibit, 2003
An assessment of the role of fluid dynamic resistance and/or aerodynamic drag and the relationship to energy use in the United States is presented. Existing data indicates that up to 25% of the total energy consumed in the United States is used to overcome aerodynamic drag, 27% of the total energy used in the United States is consumed by transportation
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Damping and Aerodynamic Drag

2021
The effects of damping and/or aerodynamic drag are addressed. We begin with linear damping. Much of the material deals with damped oscillators (mass–spring–dashpot systems), for which three cases are considered: (i) zero forcing, (ii) periodic forcing and (iii) arbitrary forcing. Illustrative examples include a simple test to find out when it's time to
openaire   +1 more source

Aerodynamic Drag of Perforated Plates

Nature, 1957
WE have recently conducted wind-tunnel experiments to determine the aerodynamic drag of perforated plates at zero incidence by the wake transverse method. The plates have no protuberances, yet they are aerodynamically rough and give a drag comparable with that of plates covered with protruding roughness of the same size and spacing as the holes.
J. R. D. FRANCIS, P. MINTON
openaire   +1 more source