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Drag Reduction by Riblets on a Commercial UAV [PDF]
Applied Sciences (Switzerland), 2022 Riblets are micro-grooves capable of decreasing skin-friction drag, but recent work suggests that additional benefits are possible for other components of aerodynamic drag. The effect of riblets on a fixed-wing, low-speed Unmanned Aerial Vehicle (UAV) on
Benedetto Mele +2 more
exaly +5 more sources
AIAA Journal, 2018 Koch-like riblets that iteratively protrude toward the outside (the fluid region) or cave in at the wall are examined. The near-wall microscopic fluid problem is addressed by solving for the Stokes flow with a boundary element method, yielding slip lengths for all the surface shapes considered.
Alinovi, Edoardo +2 more
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Xibei Gongye Daxue Xuebao, 2022 Turbulent drag reduction has always been a hot issue in fluid mechanics. Among various turbulent drag reduction methods, riblets has attracted wide attention due to its simple structure and convenient application.
DU Shuya, SANG Weimin, PANG Run
doaj +3 more sources
A metallic anti-biofouling surface with a hierarchical topography containing nanostructures on curved micro-riblets [PDF]
Microsystems & Nanoengineering, 2022 Metallic surface finishes have been used in the anti-biofouling, but it is very difficult to produce surfaces with hierarchically ordered structures. In the present study, anti-biofouling metallic surfaces with nanostructures superimposed on curved micro-
Taekyung Kim +4 more
doaj +2 more sources
AIP Conference Proceedings, 2020 The effectiveness of riblets in reducing friction drag has been well assessed by many experiments in flat plate flow in the end of the last century. Both theory and experiments showed that the effect of riblets only depends on the local Reynolds number, however some experiments in pressure gradient flow showed increased effectiveness of riblets.
Mele B., Tognaccini R.
openaire +3 more sources
Applied Sciences, 2023 Continuous evolution in nature has created optimum solutions for creature survival that have inspired many innovative engineering designs. Riblet geometries, passive flow control devices, have been studied, which were inspired by the skin of fast ...
Mohammad Reza Pakatchian +2 more
doaj +3 more sources
The Replication of Micro-Riblets on Ship Hulls for Drag Reduction Applications
International Journal of Technology, 2015 Desired higher ship speeds can be achieved using many performance enhancement techniques. One of the techniques is drag reduction of ships’ hulls by imbuing their surfaces with hydrophobic properties This paper presents an alternative method of ...
Sugeng Supriadi +3 more
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The Influence of Boundary Layer Caused by Riblets on the Aircraft Surface
Applied Sciences (Switzerland), 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, Zhenqing Wang, Lei Xu
exaly +3 more sources
Shark-Skin-Inspired Micro-Riblets Forming Mechanism of TC17 Titanium Alloy With Belt Grinding
IEEE Access, 2019 Belt grinding could improve the surface integrity of titanium alloys, but it is difficult to achieve breakthroughs in the grinding mechanism due to the lack of grinding mechanism of titanium alloy microriblets structure.
Guijian Xiao
exaly +3 more sources
CFD-driven neural network and SVM models for airfoil aerodynamic enhancement with bio-inspired riblets and plasma actuation [PDF]
Scientific ReportsEnhancing the airfoil performance using advanced flow control techniques is an important challenge in the aerospace and automotive industries. In this article a hybrid computational and artificial intelligence (AI) approach is developed for aerodynamic ...
Kailam Vijayakumar Karthikeyan +4 more
doaj +2 more sources