Results 261 to 270 of about 19,548 (308)
Geometrically nonlinear high-fidelity aerostructural optimization for highly flexible wings. [PDF]
Struct Multidiscipl OptimGray AC, Kennedy GJ, Martins JRRA.
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Aerodynamic drag in cycling: methods of assessment
Sports Biomechanics, 2011When cycling on level ground at a speed greater than 14 m/s, aerodynamic drag is the most important resistive force. About 90% of the total mechanical power output is necessary to overcome it. Aerodynamic drag is mainly affected by the effective frontal area which is the product of the projected frontal area and the coefficient of drag.
Frédéric Grappe, William Bertucci
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Smart Morphable Surfaces for Aerodynamic Drag Control [PDF]
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 ...
D Terwagne, Miha Brojan, Pedro M Reis
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Aerodynamic Drag and Drag Reduction
41st Aerospace Sciences Meeting and Exhibit, 2003An 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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Aerodynamic Drag of Streamers, Parafoils and Loops
43rd AIAA Aerospace Sciences Meeting and Exhibit, 2005The drag and flapping characteristics of aerodynamic decelerators in a low speed flow are considered. Streamers, parafoils and loops were investigated. These systems had combinations of areas 0.025 m2, 0.05 m 2, 0.075 m2 and aspect-ratios 3.3, 10, 20, 30. A total of 12 models for each arrangement was tested.
Carruthers, A. C. +1 more
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Aerodynamic Drag Prediction of Helicopter Fuselage
Journal of Aircraft, 2001A 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.; id_orcid 0000-0002-6512-6566 +1 more
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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
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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
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Aerodynamic of a refrigerated truck and improvement to reduce its aerodynamic drag
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2022Despite the fact that improving heavy vehicle fuel efficiency has received considerable attention, few investigations have been done on reducing the aerodynamic drag of a refrigerated truck. This study has two objectives; first, the aerodynamic of the refrigerated truck (REF-BSL) is investigated, and second, passive add-on designs ...
Jeffrey Levin, Shih-Hsiung Chen
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The aerodynamic drag of grassland
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1950Abstract An improvised drag-plate apparatus, on the principle of that used by Sheppard (1947) on a concrete surface, but suitably modified in design, has been used for exploratory measurements of the aerodynamic drag of grassland. The grass cover was variable (1 to 15 cm. in height), and measurements were made at a number of positions
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2008
Abstract The aerodynamics of golf balls is an intriguing subject and, as we shall see, it holds several surprises. The most obvious effect of the air on the flight of the ball arises when there is a strong wind. A side wind can turn a shot aimed at the fairway into a search for the ball in the rough grass.
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Abstract The aerodynamics of golf balls is an intriguing subject and, as we shall see, it holds several surprises. The most obvious effect of the air on the flight of the ball arises when there is a strong wind. A side wind can turn a shot aimed at the fairway into a search for the ball in the rough grass.
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