Results 61 to 70 of about 127,683 (368)

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

Interplay of the leading-edge vortex and the tip vortex of a low-aspect-ratio thin wing

open access: yesExperiments in Fluids, 2020
Three-dimensional vortical structures and their interaction over a low-aspect-ratio thin wing have been studied via particle image velocimetry at the chord Reynolds number of 105\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym ...
Lei Dong, Kwing-So Choi, X. Mao
semanticscholar   +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

Leading-Edge Vortex Characteristics of Low-Aspect-Ratio Sweptback Plates at Low Reynolds Number

open access: yesApplied Sciences, 2021
A sweptback angle can directly regulate a leading-edge vortex on various aerodynamic devices as well as on the wings of biological flyers, but the effect of a sweptback angle has not yet been sufficiently investigated.
Jong-Seob Han, Christian Breitsamter
doaj   +1 more source

Experimental study of the vortex system generated by a Formula 1 front wing [PDF]

open access: yes, 2007
This thesis describes the research undertaken on the behaviour of the vortex system generated by a Formula 1 front wing, as it travels about a rotating wheel.
Pegrum, Jonathan Mark
core   +1 more source

Hovering hummingbird wing aerodynamics during the annual cycle. I. Complete wing [PDF]

open access: yesRoyal Society Open Science, 2017
The diverse hummingbird family (Trochilidae) has unique adaptations for nectarivory, among which is the ability to sustain hover-feeding. As hummingbirds mainly feed while hovering, it is crucial to maintain this ability throughout the annual cycle ...
Yonathan Achache   +2 more
doaj   +1 more source

Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method

open access: yesApplied Sciences, 2022
Semi-open centrifugal pumps are widely used in various fields. However, the tip leakage vortex (TLV) has a malign effect on the impeller flow field.
Bing Qian   +5 more
doaj   +1 more source

Control of rotorcraft retreating blade stall using air-jet vortex generators [PDF]

open access: yes, 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
core   +1 more source

The leading-edge vortex and quasisteady vortex shedding on an accelerating plate [PDF]

open access: yesPhysics of Fluids, 2010
A computational inquiry focuses on leading-edge vortex (LEV) growth and shedding during acceleration of a two-dimensional flat plate at a fixed 10°–60° angle of attack and low Reynolds number. The plate accelerates from rest with a velocity given by a power of time ranging from 0 to 5.
Chen, Kevin K.   +2 more
openaire   +2 more sources

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