Results 31 to 40 of about 3,350,276 (277)

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
doaj   +1 more source

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, Node-Langlois, Thomas, Thomas Node-Langlois, James R. Gill, Phillip Joseph, Gill, James, Xin Zhang, Joseph, Phillip F.   +7 more
core   +1 more source

Dye visualization of a yawed slender delta wing

Journal of Thermal Engineering, 2015
In the present experimental study, effects of yaw angle, β on the flow structure at high angles of attack, α with 70° sweep angle, Λ were investigated using the dye visualization technique. In the case of zero yaw angle, β a pair of leading edge vortices
İlyas KARASU
doaj   +1 more source

Leading-edge vortex dynamics on plunging airfoils and wings

Journal of Fluid Mechanics, 2022
The vortex dynamics of leading-edge vortices on plunging high-aspect-ratio (AR = 10) wings and airfoils were investigated by means of volumetric velocity measurements, numerical simulations and stability analysis to understand the deformation of the leading-edge vortex filament and spanwise instabilities.
O. Son, A.-K. Gao, I. Gursul, C.D. Cantwell, Z. Wang, S.J. Sherwin   +5 more
openaire   +4 more sources

The impact of transport across the polar vortex edge on Match ozone loss estimates [PDF]

, 2008
The Match method for the quantification of polar chemical ozone loss is investigated mainly with respect to the impact of the transport of air masses across the vortex edge.
R. Müller, Müller, Rolf, Möbius, Tanja, Müller, R., Grooß, J.-U., J.-U. Grooß, Steinhorst, Hildegard-Maria, Konopka, P., Engel, Andreas, H.-M. Steinhorst, Volk, C.-Michael, Volk, C. M., Konopka, Paul, Engel, A., A. Engel, C. M. Volk, Möbius, T., Steinhorst, H.-M., Grooß, Jens-Uwe, P. Konopka, T. Möbius   +20 more
core   +2 more sources

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

Royal 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, Nir Sapir, Yossef Elimelech   +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

Applied 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, Yinhui Cai, Qiang Ding, Daoli Zhao, Weipeng Sun, Like Wang   +5 more
doaj   +1 more source

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

Physics 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., Colonius, Tim, Taira, Kunihiko   +2 more
openaire   +2 more sources

Effect of Wavy Leading Edges on Airfoil Trailing-Edge Bluntness Noise

Aerospace, 2023
Among the several noise-generation mechanisms of airfoil self-noise, trailing-edge bluntness noise is an important noise source, which is caused by the vortex shedding at blunt trailing edges.
Yudi Xing, Weijie Chen, Xingyu Wang, Fan Tong, Weiyang Qiao   +4 more
doaj   +1 more source

Influence of Area Distribution Along the Span Direction on Flapping Wing Aerodynamics in Hover Based on Numerical Modeling Analysis

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This study performed a numerical investigation to explore the effect of span-wise area distribution on flapping wing aerodynamics in hovering configuration using an in-house developed flow solver.
Guilin Wu, Shuanghou Deng, Qingxi Li
doaj   +1 more source