Results 11 to 20 of about 189,153 (303)
Journal of Fluid Mechanics, 2021 The mechanisms of leading-edge vortex (LEV) formation and its stable attachment to revolving wings depend highly on Reynolds number ($\textit {Re}$).
Long Chen +4 more
semanticscholar +1 more source
The essence of generating vortex-within-a-vortex structures behind forked caudal fins
AIP Advances, 2022 This work focuses on vortex-within-a-vortex (VV) structures behind three different shapes of forked caudal fin with a heaving-pitching motion. The results show that the synchronization of trailing-edge vortex separation and the shedding of the leading ...
Zhongying Xiong
doaj +1 more source
Numerical model and hydrodynamic performance of tuna finlets
Theoretical and Applied Mechanics Letters, 2022 Finlets, a series of small individual triangular fins located along the dorsal and ventral midlines of the body, are remarkable specializations of tuna and other scombrid fishes capable of high-speed swimming.
Jun-Duo Zhang, Wei-Xi Huang
doaj +1 more source
Insights into leading edge vortex formation and detachment on a pitching and plunging flat plate [PDF]
Experiments in Fluids, 2020 The present study is a prelude to applying different flow control devices on pitching and plunging airfoils with the intention of controlling the growth of the leading edge vortex (LEV); hence, the lift under unsteady stall conditions. As a pre-requisite
J. Kissing +5 more
semanticscholar +1 more source
The Aerodynamic Effect of an Alula-like Vortex Generator on a Revolving Wing
Biomimetics, 2022 An alula is a small structure of feathers that prevents birds from stalling. In this study, the aerodynamic effect of an alula-like vortex generator (alula-VG) on a revolving wing was investigated using the PIV technique in a water tank. The alula-VG was
Ping-Han Chung +2 more
doaj +1 more source
Aerodynamic performance of dragonfly wing model that starts impulsively: how vortex motion works
Journal of Fluid Science and Technology, 2023 The cross-section of dragonfly wings has corrugated structures. In particular, the leading-edge side of the wing consists of V-shaped structures. According to previous studies, a corrugated wing may exhibit high aerodynamic performance at low Reynolds ...
Yusuke FUJITA, Makoto IIMA
doaj +1 more source
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
openaire +3 more sources
Delaying leading edge vortex detachment by plasma flow control at topologically critical locations [PDF]
, 2020 Flapping wing propulsion offers unrivalled manoeuvrability and efficiency at low flight speeds and in hover. These advantages are attributed to the leading edge vortex developing on an unsteady wing, which induces additional lift. We propose and validate
J. Kissing +4 more
semanticscholar +1 more source
Applied Sciences, 2022 The performance and efficiency of a centrifugal compressor are usually affected by the highly complex 3-dimensional flow structures which develop in the flow field of the compressor.
Seongbin Hong +2 more
doaj +1 more source
Pulsed Blowing Interacting with a Leading-Edge Vortex
Aerospace, 2020 Manipulation of vortex instabilities for aerodynamic performance increase is of great interest in numerous aeronautical applications. With increasing angle of attack, the leading-edge vortex of a semi-slender delta wing becomes unsteady and eventually ...
Andrei Buzica, Christian Breitsamter
doaj +1 more source