Results 71 to 80 of about 44,596 (308)

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Mid-Infrared Vortex Beam Generator Based on Planar Metamaterials

Photonics
We designed a kind of new vortex beam generator based on a planar all-dielectric metamaterial in the mid-infrared band. The height of this generator remains constant in the plane, and the effective refractive index increases gradually in the azimuthal ...
Wei Qiao, Xiaoyang Guo, Qipeng Wang, Peng Liu, Runze Yan, Junyang Li, Jie Sun, Guiqiang Du   +7 more
doaj   +1 more source

Echo-Enabled X-Ray Vortex Generation

Physical Review Letters, 2012
A technique to generate high-brightness electromagnetic vortices with tunable topological charge at extreme ultraviolet and x-ray wavelengths is described. Based on a modified version of echo-enabled harmonic generation for free-electron lasers, the technique uses two lasers and two chicanes to produce high-harmonic microbunching of a relativistic ...
Hemsing, E., Marinelli, A.
openaire   +3 more sources

Development of a perturbation generator for vortex stability studies [PDF]

Theory predicts vortex instability when subjected to certain types of disturbances. It was desired to build a device which could introduce controlled velocity perturbations into a trailing line vortex in order to study the effects on stability.
Ash, Robert L., Riester, J. E.
core   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

Advanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice, Krzysztof S. Stopka, Michael D. Sangid   +2 more
wiley   +1 more source

Enhancing Aerodynamic Performance of Horizontal Axis Wind Turbine Blade Aerodynamic Performance Under Rough Wall Condition Using Vortex Generators

Journal of Marine Science and Engineering
In the complex and harsh working environment of wind turbines, the horizontal axis wind turbine blade is increasingly confronted with the issue of surface roughening.
Yingjian Yang, Dian Wang, Hairui Zhang, Rongyu Zha, Guangxing Wu, Chang Cai, Jianhua Zhang, Qing’an Li   +7 more
doaj   +1 more source

Aerodynamics of vortex generators [PDF]

An experimental and theoretical study was undertaken of the separation delay and dramatic boundary-layer thinning that can occur in vortex-generator installations.
Breidenthal, Robert E., Jr., Russell, David A.   +1 more
core   +1 more source

Prediction of Surface Topography Parameters in Direct Laser Interference Patterning of Stainless Steel Using Infrared Monitoring and Convolutional Neural Networks

Advanced Engineering Materials, EarlyView.
This study presents an infrared monitoring approach for direct laser interference patterning (DLIP) combined with a convolutional neural network (CNN). Thermal emission data captured during structuring are used to predict surface topography parameters.
Lukas Olawsky, Marcelo Sallese, Leander Kläber, Clemens Kuhn, Keming Du, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Blade Vortex Interactions: Experimental Measurements of the Near-Flow Field

Journal of Fluid Science and Technology, 2009
The near-field flow structure of an intense streamwise vortex filament encountering normally with a blade tip vortex was investigated experimentally. Three cases were investigated, direct impingement, interactions on the pressure side and interactions ...
Yasser ABOELKASSEM
doaj   +1 more source

An experimental investigation of S-duct flow control using arrays of low-profile vortex generators [PDF]

An experimental investigation was undertaken to measure the effect of various configurations of low-profile vortex generator arrays on the flow in a diffusing S-duct.
Reichert, Bruce A., Wendt, Bruce J.
core   +1 more source