Results 21 to 30 of about 11,271 (298)

Effect of leading-edge tubercles on the flow over low-aspect-ratio wings at low Reynolds number

open access: yesTheoretical 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
doaj   +1 more source

Formation of the leading-edge vortex and spanwise flow on an insect-like flapping-wing throughout a flapping half cycle [PDF]

open access: yes, 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
core   +1 more source

Numerical Studies on the Effect of Leading Edge Tubercles on a Low-Pressure Turbine Cascade

open access: yesEnergies, 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
doaj   +1 more source

Leading-Edge Vortex Lift (LEVL) Sample Probe for Venusian Atmosphere

open access: yesAerospace, 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
doaj   +1 more source

Evolution of the leading-edge vortex over a flapping wing mechanism

open access: yesJournal 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
doaj   +1 more source

Reduced dimension modeling of leading edge turbulent interaction noise [PDF]

open access: yes, 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
core   +1 more source

Aerodynamic improvement of a delta wing in combination with leading edge flaps

open access: yesTheoretical 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
doaj   +1 more source

Application of digital particle image velocimetry to insect aerodynamics: measurement of the leading-edge vortex and near wake of a Hawkmoth [PDF]

open access: yes, 2007
Some insects use leading-edge vortices to generate high lift forces, as has been inferred from qualitative smoke visualisations of the flow around their wings.
Taylor, Graham K.   +3 more
core   +1 more source

Leading-Edge Roughness Affecting Diamond-Wing Aerodynamic Characteristics

open access: yesAerospace, 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
doaj   +1 more source

Non-linear unsteady aerodynamic model for insect-like flapping wings in the hover. Part 1: Methodology and analysis [PDF]

open access: yes, 2006
The essence of this two-part paper is the analytical, aerodynamic modelling of insect-like flapping wings in the hover for microair vehicle applications.
Knowles, Kevin   +2 more
core   +1 more source

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