Results 201 to 210 of about 343,611 (255)

Aerodynamic drag reduction in winter sports: The quest for “free speed”

Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, 2020
The Winter Olympics are a highly competitive sporting environment where subtle improvements in performance can impact the finishing order in many events. Aerodynamic drag is known to be a significant resistive force to human movement in high-speed sports,
L. Brownlie
semanticscholar   +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
openaire   +1 more source

DrivAerNet: A Parametric Car Dataset for Data-Driven Aerodynamic Design and Graph-Based Drag Prediction

Design Automation Conference
This study introduces DrivAerNet, a large-scale high-fidelity CFD dataset of 3D industry-standard car shapes, and RegDGCNN, a dynamic graph convolutional neural network model, both aimed at aerodynamic car design through machine learning.
Mohamed Elrefaie, Angela Dai, Faez Ahmed
semanticscholar   +1 more source

Aerodynamic Drag of Streamers, Parafoils and Loops

43rd AIAA Aerospace Sciences Meeting and Exhibit, 2005
The 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., Filippone, A.; id_orcid 0000-0002-6512-6566   +1 more
openaire   +2 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.; id_orcid 0000-0002-6512-6566, Michelsen, J. A.   +1 more
openaire   +1 more source

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

The aerodynamic drag of grassland

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1950
Abstract 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
openaire   +1 more source

Reduction of Aerodynamic Drag

1981
Abstract : A study is being made of the effect on aerodynamic drag of boundary layer irradiation by radioactive sources. A blow-down wind tunnel and a skin friction drag balance have been designed and constructed. The balance is of the null-position type, and is operated using an automatic control system to maintain the null position of the drag plate.
J. Clark, W. G. Rees, W. A. Wilby, J. E. Field   +3 more
openaire   +1 more source

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, 2022
Despite 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
openaire   +1 more source

Experimental and numerical investigations of the vehicle aerodynamic drag with single-channel rear diffuser

, 2020
The main purpose of this paper is to reveal the drag reduction mechanism of single-channel rear diffuser on the vehicle aerodynamic drag and to obtain the relationship between the structure parameters of rear diffuser and the vehicle aerodynamic drag ...
H. Taiming, Zhu Xiaodong, W. Zhongmin, G. Zhengqi   +3 more
semanticscholar   +1 more source