Results 21 to 30 of about 3,350,276 (277)
A Rotary Wing System for Micro Air Vehicle Applications. Part 1 [PDF]
INCAS Bulletin, 2011 The goal of the paper is to propose a new type of ornithopter that avoids the mechanical difficulties of a flapping system. It uses a modified design of a cycloidal propulsor.
Valentin BUTOESCU
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Frontiers in Energy Research, 2022 A hydrofoil is a fundamental structure in fluid machinery, and it is widely applied to the fields of propellers, blades of axial flow pumps and underwater machinery.
Hao Yan +4 more
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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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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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Control of rotorcraft retreating blade stall using air-jet vortex generators [PDF]
, 2006 A series of low-speed wind tunnel tests were carried out on an oscillating airfoil fitted with two rows of air-jet vortex generators (AJVGs). The airfoil used had an RAE 9645 section and the two spanwise arrays of AJVGs were located at x/c=0.12 and 0.62.
Kokkalis, A +17 more
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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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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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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 Roughness Affecting Diamond-Wing Aerodynamic Characteristics
Aerospace, 2018 Diamond wing configurations for low signature vehicles have been studied in recent years. Yet, despite numerous research on highly swept, sharp edged wings, little research on aerodynamics of semi-slender wings with blunt leading-edges exists. This paper
Andrei Buzica +3 more
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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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