Results 1 to 10 of about 1,190 (227)
Applied Sciences (Switzerland), 2022 In the present investigation, a wind tunnel experiment was performed to evaluate the effectiveness of the trailing edge jets control scheme to mitigate the unsteady aerodynamic force and flow structure of a single box girder (SBG) model. The flow control
Guanbin Chen +2 more
exaly +3 more sources
Hovering hawkmoths exploit unsteady circulation to produce aerodynamic force. [PDF]
Biol LettThis study employs an integrated approach, combining three-dimensional flow visualization and two-dimensional flow measurement to investigate the underlying unsteady aerodynamic mechanisms of hovering hawkmoths. Using a single vortex ring model, three aerodynamic force components, such as aerodynamic force induced by unsteady circulation ...
Liu Y, Li B, Zhou D.
europepmc +4 more sources
Condensation of Distributed Loads on Slender Body and Its Application in Aeroservoelastic Ground Simulation [PDF]
Hangkong bingqi, 2023 Aeroservoelastic ground simulation test is a new aeroelastic ground test technology developed in recent years. One of the key problems is the condensation of unsteady aerodynamic forces, that is, the distributed aerodynamic loads on flight vehicles are ...
Wu Zhigang, Yin Liepeng, Yu Changkun
doaj +1 more source
Mathematics, 2021 In order to obtain the aerodynamic loads of the vibrating blades efficiently, the eXterme Gradient Boosting (XGBoost) algorithm in machine learning was adopted to establish a three-dimensional unsteady aerodynamic force reduction model.
Mingming Zhang, Shurong Hao, Anping Hou
doaj +1 more source
Effects of “S”-Type Bowed Guide Vanes on Unsteady Flow in 1.5-Stage Axial Compressors
Applied Sciences, 2023 In axial compressors, the unsteady flow caused by the interaction between dynamic and static cascades will make the moving vanes subject to periodic forces and increase the risk of high-cycle fatigue fractures. In this study, an “S”-type bowed guide vane
Yupeng Liu +4 more
doaj +1 more source
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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Unsteady aerodynamic forces on long lorry platoons [PDF]
Journal of Wind Engineering and Industrial Aerodynamics, 2021 Abstract In an earlier paper the authors describe an experimental investigation to measure the forces on 1/20th scale vehicles in long platoons, together with the flow field around the platoons, using the University of Birmingham moving model TRAIN rig facility, that can accommodate 8-vehicle platoons and provide a realistic ground simulation.
F.H. Robertson, D. Soper, C. Baker
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Drones, 2023 Considering the vibration generated by a propeller-driven UAV or encountering gust, the propeller will perform a very complex follower motion. A pitch and rotating coupled motion is proposed in the present work that can take more complex unsteady ...
Zhitao Zhang +3 more
doaj +1 more source
Applied Sciences, 2022 Unsteady aerodynamic forces are significantly critical to the safety and stability of trains traveling in high winds. This paper describes a study into unsteady crosswind forces of a moving train subjected to a three-dimensional stochastic wind field ...
Zhiyong Yao +3 more
doaj +1 more source
Energies, 2021 The validity of using a low-computational-cost model for the aerodynamic characterization of Airborne Wind Energy Systems was studied by benchmarking a three-dimensional Unsteady Panel Method (UnPaM) with experimental data from a flight test campaign of ...
Iván Castro-Fernández +3 more
doaj +1 more source