Results 1 to 10 of about 1,102,632 (282)
How oscillating aerodynamic forces explain the timbre of the hummingbird’s hum and other animals in flapping flight [PDF]
eLife, 2021 How hummingbirds hum is not fully understood, but its biophysical origin is encoded in the acoustic nearfield. Hence, we studied six freely hovering Anna’s hummingbirds, performing acoustic nearfield holography using a 2176 microphone array in vivo ...
Ben J Hightower +7 more
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Influence of speed and line spacing on aerodynamic forces in high speed train passing in tunnels [PDF]
Scientific ReportsAs train speeds increase, the aerodynamic effects generated during the passage of high-speed trains in tunnels become more pronounced. This article investigates the influence of line spacing on the aerodynamic forces during the passage of high-speed ...
Xiuping Duan +3 more
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Moment‐Equivalent Adhesion Statistics Inferred From Particle Resuspension Kinetics [PDF]
Small ScienceParticle resuspension from surfaces is a fundamental process in many chemical engineering systems, including aerosol dispersion, powder processing, filtration, contamination control, and environmental dispersion.
Roy Almog, Ziv Klausner, Ronen Berkovich
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The Refined Simulation Methods of Fluctuating Wind and Aerodynamic Forces Relative to Moving Trains
Applied SciencesThis study proposes a framework to accurately simulate the fluctuating wind and aerodynamic forces relative to moving trains. It provides a novel method for calculating the power spectra of the fluctuating wind relative to moving trains and the time ...
Naijie Yan +5 more
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Effect of the shape of flapping airfoils on aerodynamic forces. [PDF]
HeliyonThe rapid exhaustion of fossil fuels and the ozone depletion caused by the excessive usage of the fossil fuels has prompted researchers to look towards bioinspired designs for both propulsion and energy extraction purposes. Limited amount of work has been done to present the effects of airfoil shape on the aerodynamic forces on flapping foils.
Butt F +6 more
europepmc +5 more sources
Nihon Kikai Gakkai ronbunshu, 2022 The aerodynamic forces acting on a train travelling in a tornado-like swirling flow were investigated using a tornado simulator and a moving model rig. Rectangular shaped vehicles in scale 1/40 and 1/67 and a round-roofed vehicle in scale 1/40 were used.
Fumiya INUZUKA +3 more
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Mechanical Engineering Journal, 2021 This paper discusses that the unsteady aerodynamic forces caused by vehicle motion in road input have a large influence on the vehicle behaviors. In the present coupling analysis, unsteady aerodynamic forces were obtained by using the response functions ...
Kazuhiro MAEDA +3 more
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Applied Sciences, 2022 This paper explores the nonlinear characteristics of the self-excited aerodynamic forces of a semi-closed box deck section to perfect the theory of aeroelastic response analysis.
Haoyang Lu +3 more
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On the Aerodynamic Forces on a Baseball, With Applications [PDF]
Frontiers in Applied Mathematics and Statistics, 2019 The aerodynamic forces acting on a baseball are those produced by the contact between the ball and the air, and are defined by the initial conditions of the pitch. It is well known that such forces determine the changes from the typical parabolic ballistic trajectory, either in the direction of the movement of the ball (drag force), or producing a lift
Gerardo J. Escalera Santos +6 more
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Mechanical Engineering Journal, 2020 In this study, unsteady aerodynamic forces induced by forced pitch and heave motions are measured and formulated to the unsteady aerodynamic coefficients by utilizing the 1/4-scale nearly actual vehicle model with wheels and wheel-houses and a system ...
Kazuhiro MAEDA +3 more
doaj +1 more source