Results 1 to 10 of about 7,026 (117)
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
doaj +2 more sources
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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Estimation of Airship Aerodynamic Forces and Torques Using Extended Kalman Filter
IEEE Access, 2020 An airship is a lighter than air, aerial vehicle whose model is based on dynamic, aerodynamic, aerostatic and propulsion forces and torques. Apart from other, aerodynamic forces and toques are difficult to measure.
Muhammad Wasim, Ahsan Ali
exaly +3 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
doaj +1 more source
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
doaj +1 more source
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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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
The Effects of Aerodynamic Interference on the Aerodynamic Characteristics of a Twin-Box Girder
Applied Sciences, 2021 To investigate the aerodynamic characteristics of a twin-box girder in turbulent incoming flow, we carried out wind tunnel tests, including two aerodynamic interferences: leading body-height grid, and leading circular cylinder.
Buchen Wu +3 more
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Modelling of the unmanned aerial vehicles flight control system
Aviation, 2021 The article is an independent work containing the author’s ingenious research methodology and the model of the control system of Unmanned Aerial Vehicles. Furthermore a unique and world first mathematical model of an Unmanned Aerial Vehicle was developed,
Mirosław Adamski
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The effect of moving train on the aerodynamic performances of train-bridge system with a crosswind
Engineering Applications of Computational Fluid Mechanics, 2020 Some aerodynamic results about the effect of moving train on the aerodynamics of train-bridge system in crosswinds are introduced using a computational fluid dynamics (CFD) method.
Zhiyong Yao +5 more
doaj +1 more source