Results 51 to 60 of about 127,683 (368)
Numerical Investigation of a Dynamic Stall on a Single Rotating Blade
Aerospace, 2021 Dynamic stall is a phenomenon on the retreating blade of a helicopter which can lead to excessive control loads. In order to understand dynamic stall and fill the gap between the investigations on pitching wings and full helicopter rotor blades, a ...
Yin Ruan, Manfred Hajek
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Journal of Fluid Mechanics, 2014 Unsteady aerofoil flows are often characterized by leading-edge vortex (LEV) shedding. While experiments and high-order computations have contributed to our understanding of these flows, fast low-order methods are needed for engineering tasks. Classical
Granlund, Kenneth +4 more
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Manipulation of Leading-Edge Vortex Flow [PDF]
Aerospace, 2020 At very high angles of attack, the leading-edge vortex of a semi-slender delta wing becomes unsteady and collapses, endangering the flight stability. Active flow control by pulsed blowing stabilizes the vortex system, enlarging the flight envelope for such wing configurations.
Andrei Buzica, Christian Breitsamter
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Effect of leading-edge tubercles on the flow over low-aspect-ratio wings at low Reynolds number
Theoretical and Applied Mechanics Letters, 2023 Two-dimensional time-resolved particle image velocimetry (TR-PIV) and stereographic particle image velocimetry (SPIV) techniques were used to investigate the effect of leading-edge tubercles on the flow over low-aspect-ratio wing models.
Pengxin Yang, Yichen Zhu, Jinjun Wang
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Formation of the leading-edge vortex and spanwise flow on an insect-like flapping-wing throughout a flapping half cycle [PDF]
, 2013 This paper presents an experimental investigation of the evolution of the leading-edge vortex and spanwise flow generated by an insect-like flapping-wing at a Reynolds number relevant to flapping-wing micro air vehicles (FMAVs) (Re = ~15,000 ...
Knowles, Kevin, Phillips, Nathan
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Numerical Studies on the Effect of Leading Edge Tubercles on a Low-Pressure Turbine Cascade
Energies, 2023 The influence of the bionic leading edge tubercles on the aerodynamic performance of a high-speed low-pressure turbine has been numerically studied. Nine different tubercle configurations were designed to reduce the loss of the cascade at high Mach and ...
Wenhua Duan +3 more
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Leading-Edge Vortex Lift (LEVL) Sample Probe for Venusian Atmosphere
Aerospace, 2022 Can a small, lightweight, free-falling sample probe be slowed enough in the Venusian atmosphere to run a 10 min microelectromechanical systems (MEMS) ion gas micro spectrometer, without adding a propulsion systems or explosives and parachutes to the ...
Christopher Isaac, Nick Jones
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Evolution of the leading-edge vortex over a flapping wing mechanism
Journal of Mechanical Engineering and Sciences, 2020 Leading-edge vortex governs the aerodynamic force production of flapping wing flyers. The primary factor for lift enhancement is the leading-edge vortex (LEV) that allows for stall delay that is associated with unsteady fluid flow and thus generating ...
Muhamad Ridzuan Arifin +6 more
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Reduced dimension modeling of leading edge turbulent interaction noise [PDF]
, 2014 A computational aeroacoustics approach is used to model the effects of real airfoil geometry on leading edge turbulent interaction noise for symmetric airfoils at zero angle of attack.
Zhang, Xin +7 more
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Aerodynamic improvement of a delta wing in combination with leading edge flaps
Theoretical and Applied Mechanics Letters, 2017 Recently, various studies of micro air vehicle (MAV) and unmanned air vehicle (UAV) have been reported from wide range points of view. The aim of this study is to research the aerodynamic improvement of delta wing in low Reynold’s number region to ...
Tadateru Ishide, Mao Itazawa
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