Results 21 to 30 of about 3,774 (202)
Turbulent structure effects due to ordered surface roughness
Alexandria Engineering Journal, 2020 The effects of ordered surface feature in the form of converging-diverging riblets are investigated experimentally on an airfoil. Riblet sheets are applied onto the surface of NACA 0026 airfoil at a yaw angle of α=0°,±10°, Riblet height of h = 1 mm, and ...
Zambri Harun +3 more
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Flow structures and wall parameters on rotating riblet disks and their effects on drag reduction
Alexandria Engineering Journal, 2022 The demand of energy saving and loss mitigation in modern industry gives rise to drag reduction techniques such as micro groove/riblet ever since the last century.
Tong Liang +3 more
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Reynolds-dependence of turbulent skin-friction drag reduction induced by spanwise forcing [PDF]
, 2016 This paper examines how increasing the value of the Reynolds number $Re$ affects the ability of spanwise-forcing techniques to yield turbulent skin-friction drag reduction.
Gatti, Davide, Quadrio, Maurizio
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Design of serrate-semi-circular riblets with application to skin friction reduction on engineering surface [PDF]
, 2014 Drag reduction in wall-bounded flows can be achieved by the passive flow control technique through the application of bio-inspired riblet surfaces. This paper presents the innovative design of Serrate-Semi-Circular riblet surfaces particularly focusing ...
Cheng, K +3 more
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The Influence of Boundary Layer Caused by Riblets on the Aircraft Surface
Applied Sciences, 2020 Drag reduction of riblets is one of the most important problems in drag reduction of non-smooth surfaces. In the past two decades, the use of riblets arranged along the flow direction to reduce frictional resistance has received considerable attention ...
Hongqing Lv +3 more
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Numerical simulation of turbulent channel flow with particle-adhered riblet surfaces
Journal of Fluid Science and Technology, 2023 Numerical simulations of particle laden and fully developed turbulent channel flows with rectangular riblet were performed to investigate the influence of particle adhesion on the drag reduction effect.
Chikara SHIMIZU +2 more
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011 The interaction of the overlying turbulent flow with riblets, and its impact on their drag reduction properties are analysed. In the so-called viscous regime of vanishing riblet spacing, the drag reduction is proportional to the riblet size, but for larger riblets the proportionality breaks down, and the drag reduction eventually becomes ...
García Mayoral, Ricardo +1 more
openaire +3 more sources
Study on Riblet Drag Reduction Considering the Effect of Sweep Angle
Energies, 2019 This study computationally evaluates the riblet drag reduction effect considering the effect of sweep angle. An implicit large eddy simulation is performed on a channel flow and an infinite swept wing.
Yufei Zhang, Yuhui Yin
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Skin friction drag reduction over staggered three dimensional cavities [PDF]
, 2019 The effect of three-dimensional staggered circular cavities on a zero-pressure gradient incompressible turbulent boundary layer was studied. Two key parameters were varied, being the ratio of the diameter, d, to the depth, h, of the cavity, d/h and the ...
Atkin, C.J. +2 more
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Numerical and experimental investigations on drag-reducing effects of riblets
Engineering Applications of Computational Fluid Mechanics, 2021 The numerical simulation and force measurement experiment are conducted in this work. The direct numerical simulation method with high-order schemes is performed to resolve the incompressible turbulent flow over riblets.
Chaoqun Li, Shuo Tang, Yi Li, Zihai Geng
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