Results 101 to 110 of about 8,471 (240)
Numerical Simulation of Blade-Shaped Riblets Using LES-Based Methods
Chemical Engineering Transactions, 2023 Passive flow control techniques are widely implemented in many areas of fluid mechanics and aerodynamics, aiming at permanently altering the flow field to suppress undesired phenomena or enhance performance.
Chris Bliamis +3 more
doaj
VISCOUS DRAG REDUCTION ON AXISYMMETRIC BODIES USING HELICAL RIBLETS [PDF]
International Journal of Advanced Design and Manufacturing Technology, 2014 A series of subsonic wind tunnel tests was conducted on an ogive-cylinder-flare configuration at zero angle of attack to study the effects of small helical protuberances on viscous drag reduction behavior.
Ali Davari
doaj
Hydrodynamic aspects of shark scales [PDF]
Ridge morphometrices on placoid scales from 12 galeoid shark species were examined in order to evaluate their potential value for frictional drag reduction.
Musick, J. A., Raschi, W. G.
core +1 more source
Effect of drag reducing riblet surface on coherent structure in turbulent boundary layer
Chinese Journal of Aeronautics, 2019 The characteristics of turbulent boundary layer over streamwise aligned drag reducing riblet surface under zero-pressure gradient are investigated using particle image velocimetry.
Guangyao Cui +4 more
semanticscholar +1 more source
Investigation on the Mechanism of Drag Modification over Triangular Riblets
Journal of Applied Fluid Mechanics, 2020 This paper presents experimental and numerical investigations on the modification of local spanwise skin-friction over triangular riblets under the total drag reduction condition.
M. M. Zhang, Z. L. Zhang, M. Zhao
doaj
Method and apparatus for reducing the drag of flows over surfaces [PDF]
, 1998 An apparatus, and its accompanying method, for reducing the drag of flows over a surface includes arrays of small disks and sensors. The arrays are embedded in the surface and may extend above, or be depressed below, the surface, provided they remain ...
Keefe, Laurence R.
core +1 more source
NACA 2412 Drag Reduction Using V-Shaped Riblets
EngThis research focuses on addressing a significant concern in the aviation industry, which is drag. The primary objective of this project is to achieve drag reduction through the implementation of riblets on a wing featuring the NACA 2412 aerofoil ...
Smitha Mol Selvanose +3 more
doaj +1 more source
High-efficiency laser fabrication of drag reducing riblet surfaces on pre-heated Teflon
Materials Research Express, 2019 Bio-inspired surfaces are able to decrease friction with fluids and gases. The most recognizable are shark-skin-like riblet surface structures. Such bio-inspired surfaces can be formed by the laser ablation technique.
Andrius Žemaitis +4 more
semanticscholar +1 more source
Synthesis of Antenna Arrays of Maximum Directivity for a Specified Sidelobe Level
Iranian Journal of Electrical and Electronic Engineering, 2021 Linear and planar antenna arrays are synthesized to have maximum directivity for a specified sidelobe level. The directivity is maximized subject to a given SLL. The beamwidth and the zeros of array factor are studied as well as the directivity.
M. Khalaj-Amirhosseini
doaj
The Physics of Fluids, 2019 Micro-scale riblets are shown to systematically modify viscous skin friction in laminar flows at high Reynolds numbers.
Shabnam Raayai-Ardakani, G. McKinley
semanticscholar +1 more source