Results 31 to 40 of about 9,620 (304)

Aerodynamic Effects of Corrugation on Dragonfly Hindwing

open access: yesHangkong gongcheng jinzhan, 2019
To study aerodynamic performance of the dragonfly wing at gliding flight at different Reynolds numbers, a three-dimensional model of the dragonfly hindwing with corrugation and a three-dimensional flat plate with the same shape of the dragonfly hindwing ...
Luo Yun   +4 more
doaj   +1 more source

Verification of elastically supported beam model for growth mechanism analysis of rail corrugation

open access: yesNihon Kikai Gakkai ronbunshu, 2020
Rail corrugation that causes the vibration and the noise is a phenomenon in which roughness patterns of approximately regular wavelengths are formed on the rail running surface by trains running.
Mitsuo ABOSHI, Hirofumi TANAKA
doaj   +1 more source

Top-of-Rail Lubricants: Potential Risks and Benefits

open access: yesProceedings, 2018
Top-of-rail (TOR) lubricants represent modern approach for friction modification between wheel and rail. The main goal of this study was to investigate potential risks and benefits associated with the application of these products, especially in terms of
Radovan Galas   +2 more
doaj   +1 more source

Formation Mechanism of Metro Rail Corrugation Based on Wheel–Rail Stick–Slip Behaviors

open access: yesApplied Sciences, 2021
Field investigation shows that most corrugations occur on the inner rail surface of curved tracks with a radius of less than 700 m. In order to explore the formation mechanism of metro corrugation, the relationship between wheel–rail stick–slip ...
Zhiqiang Wang, Zhenyu Lei
doaj   +1 more source

Corrugated multi-supersheets [PDF]

open access: yesJournal of High Energy Physics, 2013
We explore the multi-superthreads and supersheets solutions of six-dimensional N=1 supergravity coupled to a tensor multiplet. The solutions carry D1-D5-P charges, but no Kaluza-Klein monopole. We lay down the formalism to construct multiple supersheets with arbitrary and independent profiles.
openaire   +3 more sources

Effects of corrugation frequency and aspect ratio on natural convection within an enclosure having sinusoidal corrugation over a heated top surface

open access: yes, 2011
Natural convection of a two-dimensional laminar steady-state incompressible fluid flow in a modified rectangular enclosure with sinusoidal corrugated top surface has been investigated numerically.
Saha, S.C.   +5 more
core   +1 more source

Experimentally Based Numerical Simulation of the Influence of the Agricultural Subsurface Drainage Pipe Geometric Structure on Drainage Flow

open access: yesAgriculture, 2022
The geometric structure of corrugated plastic pipes affects performance in agricultural subsurface drainage systems. To explore the influence of pipe geometry on flow field characteristics and the characterization of water movements, we developed a three-
Zhe Wu   +4 more
doaj   +1 more source

Rail Corrugation Index Development by Sound-Field Excitation on the Carriage Floor of In-Service Train

open access: yesSensors, 2023
The steel rail and wheel in the railway system offer a high precision and smooth-running surface. Nevertheless, the point of contact between the rail and wheel presents a critical area that can give rise to rail corrugation.
Wei-Lun Hsu, Chia-Ming Chang
doaj   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

open access: yesAdvanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal   +3 more
wiley   +1 more source

A Numerical Study on the Crashworthiness of Corrugated Conical Tubes with Small Semi-Apical Angles and Their Influence Mechanism

open access: yesBiomimetics
To develop a new type of biomimetic single-cell and multi-cell energy-absorbing box (tube) featuring conical tubes at the intersection of cell walls, it is necessary to address the issue of large bottom-space requirements in current conical energy ...
Yiheng Song   +3 more
doaj   +1 more source

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