Results 21 to 30 of about 1,102,632 (282)
Some solvable non-linear equations related to aerodynamic instability phenomena
Vietnam Journal of Mechanics, 1994 This article proposes some forms of aerodynamic forces, looks for accurate solutions of core - pendent non-linear differential equations and analyses the characteristics of aerodynamic forces and of equation's solution.
Nguyen Dang Bich, Nguyen Vo Thong
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Modelling dynamic pantograph loads with combined numerical analysis
Railway Engineering Science, 2023 Appropriate interaction between pantograph and catenary is imperative for smooth operation of electric trains. Changing heights of overhead lines to accommodate level crossings, overbridges, and tunnels pose significant challenges in maintaining ...
F. F. Jackson +8 more
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A Fast Correction Method of Model Deformation Effects in Wind Tunnel Tests
Aerospace, 2018 The influence of model deformation needs to be corrected before the aerodynamic force data measured in the wind tunnel is applied to aircraft design. In order to obtain the aerodynamic forces on rigid model shape, this paper presents a fast correction ...
Yan Sun +3 more
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The effects of surface roughness on the aerodynamic drag coefficient of vehicles
International Journal of Automotive Science and Technology, 2022 In this study, the effects of surface roughness differences of vehicle coating materials (paint, paste, special applications, etc.) on the aerodynamic drag coefficient were inves-tigated using the finite element method.
Kemal Ermiş +2 more
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Unsteady aerodynamic forces of a flapping wing [PDF]
Journal of Experimental Biology, 2004 SUMMARYThe unsteady aerodynamic forces of a model fruit fly wing in flapping motion were investigated by numerically solving the Navier–Stokes equations. The flapping motion consisted of translation and rotation [the translation velocity (ut) varied according to the simple harmonic function (SHF), and the rotation was confined to a short period around ...
Jiang Hao, Wu, Mao, Sun
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Advances in Civil Engineering, 2022 In order to study the nonlinear characteristics of self-excited aerodynamic forces of bluff body bridge section with the change of motion parameters, a numerical wind tunnel is established by the dynamic mesh technique of computational fluid dynamics ...
Jie Jia +3 more
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Influence of wing kinematics on aerodynamic performance in hovering insect flight [PDF]
, 2007 The influence of different wing kinematic models on the aerodynamic performance of a hovering insect is investigated by means of two-dimensional time-dependent Navier–Stokes simulations.
Bijl, H. +8 more
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An investigation into the mechanical damping characteristics of catenary contact wires and their effect on aerodynamic galloping instability [PDF]
, 2003 Measurement of the damped oscillation of a section of the UK East Coast Main Line (ECML) catenary/contact wire system was undertaken, and the natural frequency and mechanical damping were found to be 1.4Hz and 0.05 respectively. This information was used
Craighead, I.A. +3 more
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Aeroservoelastic flutter and frequency response interactions on the CL-704 aircraft [PDF]
INCAS Bulletin, 2012 Two methods for the aerodynamic forces conversions from frequency into Laplace domain were conceived and validated: Least Squares LS and Minimum State MS, on the Bombardier CL-604 aircraft.
Martin DICKINSON +5 more
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Integration of crosswind forces into train dynamic modelling [PDF]
, 2011 In this paper a new method is used to calculate unsteady wind loadings acting on a railway vehicle. The method takes input data from wind tunnel testing or from computational fluid dynamics simulations (one example of each is presented in this article ...
G Xie +14 more
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