Results 21 to 30 of about 83,922 (304)
Aerodynamic drag of modern soccer balls [PDF]
SpringerPlus, 2013 Soccer balls such as the Adidas Roteiro that have been used in soccer tournaments thus far had 32 pentagonal and hexagonal panels. Recently, the Adidas Teamgeist II and Adidas Jabulani, respectively having 14 and 8 panels, have been used at tournaments; the aerodynamic characteristics of these balls have not yet been verified. Now, the Adidas Tango 12,
Asai, Takeshi, Seo, Kazuya
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Applied Sciences, 2022 Aerodynamic drag is a major cause of energy losses during alpine ski racing. Here we developed two models for monitoring the aerodynamic drag on elite alpine skiers in the technical disciplines.
Matej Majerič +4 more
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Study on Aerodynamic Drag Reduction by Plasma Jets for 600 km/h Vacuum Tube Train Sets
Machines, 2023 In order to break through the speed bottleneck, researchers envision using tubes to cover high-speed maglev trains and extract some of the air inside the tubes, creating a low-density environment on the ground, greatly reducing the aerodynamic drag of ...
Ang Li +5 more
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Aerodynamic drag analysis of runners
Medicine & Science in Sports & Exercise, 1976 A model is presented for the determination of aerodynamic drag forces on runners. The model consists of a series of conjugated circular cylinders, to stimulate the trunk and appendages, and a sphere to stimulate the head. Results are presented for three runners representing respectively, adult American males in the 2.5, 50 and 97.5 percentiles of the ...
J R, Shanebrook, R D, Jaszczak
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Numerical Investigation on Aerodynamic Drag and Noise of Pantographs with Modified Structures [PDF]
Journal of Applied Fluid Mechanics, 2022 It is well known that the pantograph, which works as a complex component of high-speed trains, is an important source of aerodynamic drag and aerodynamic noise of a high-speed train (HST) that can affect HST performance, comfort for passengers, and ...
Y. Yao +5 more
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Aerodynamic drag reduction in a vehicle based on efficient global optimisation
The Journal of Engineering, 2018 Vehicle aerodynamic shape optimisation is a typical non-linear and computationally expensive black box problem, which is severely limited by time and cost of the objective function evaluations during the global optimisation process.
Chengping Yan +4 more
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Aerodynamic Robust Design Research Using Adjoint-Based Optimization under Operating Uncertainties
Aerospace, 2023 Robust optimization design (ROD) is playing an increasingly significant role in aerodynamic shape optimization and aircraft design. However, an efficient ROD framework that couples uncertainty quantification (UQ) and a powerful optimization algorithm for
Yuhang Ma +5 more
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Improvement of the method for assessing the energy load of vehicle [PDF]
, 2019 The aim of the research is to improve the indicators assessment accuracy of the vehicle energy load by improving the method of experimentally - theoretical determination of the aerodynamic drag parameters of vehicle in motion. To achieve this goal, it is
Abramov, Dmitry +3 more
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NEW TECHNOLOGIES IMPROVING AERODYNAMIC PROPERTIES OF FREIGHT VEHICLES [PDF]
Applied Engineering Letters, 2019 Fuel consumption of heavy duty vehicles is caused by actual vehicle resistances acting during the vehicle motion. This paper deals with possibilities to reduce the vehicle aerodynamic resistance, air drag coefficient.
Tomas Skrucany +3 more
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A Streamlined Design of a High-Speed Coach for Fuel Savings and Reduction of Carbon Dioxide
International Journal of Automotive Engineering, 2011 Numerous aerodynamic designs of high-speed coaches have been made to reduce aerodynamic drag for lower fuel consumption and to keep the driving stability of the vehicle on a highway.
Chul-Ho KIM
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