Results 51 to 60 of about 372,321 (309)

Experimental Study of the Performance of a Novel Vertical-Axis Wind Turbine

Applied Sciences, 2020
Basic equations for estimating the aerodynamic power captured by the Anderson vertical-axis wind turbine (AVAWT) are derived from a solution of Navier–Stokes (N–S) equations for a baroclinic inviscid flow.
James Agbormbai, Weidong Zhu
doaj   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

An Experimental Study on the Effectiveness of the Backward-Facing Step Technique on Small-Scale Horizontal-Axis Wind Turbine Rotor Blades

Energies
The aim of this research work was to explore how modifying the design of small-scale HAWT rotor blades through the backward-facing step technique affects their efficiency under varying wind speeds.
Riad Morina, Yahya Erkan Akansu
doaj   +1 more source

Dynamic Stall of a Vertical-Axis Wind Turbine and Its Control Using Plasma Actuation

Energies, 2019
In this paper, a dynamic stall control scheme for vertical-axis wind turbine (VAWT) based on pulsed dielectric-barrier-discharge (DBD) plasma actuation is proposed using computational fluid dynamics (CFD).
Lu Ma, Xiaodong Wang, Jian Zhu, Shun Kang   +3 more
doaj   +1 more source

Wake control through tip-speed ratio adaptation

Abstract. Offshore wind farms can generate wake losses between 10 and 20 % even after layout optimization. By altering the turbine operational parameters, it is possible to reduce internal wake effects. A wake-control approach by modifying the operational tip-speed ratio is presented here using LES high-fidelity modelling with DTU 10 MW reference wind ...
Knauer, Andreas, Mütschard, Lutz, Churchfield, Matt, Sirnivas, Senu   +3 more
openaire   +2 more sources

Wind-tunnel modelling of the tip-speed ratio influence on the wake evolution

Journal of Physics: Conference Series, 2016
Wind-tunnel measurements on the near-wake evolution of a three bladed horizontal axis wind turbine model (HAWT) in the scale 1:O(350) operating in uniform flow conditions and within a turbulent boundary layer at different tip speed ratios are presented.
Victor P. Stein, Hans-Jakob Kaltenbach
openaire   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

Research on Aerodynamic Performance of Asynchronous-Hybrid Dual-Rotor Vertical-Axis Wind Turbines

Energies
This study analyzes the performance degradation of traditional hybrid wind turbines under high blade-tip-speed ratio conditions and proposes solutions through two-dimensional Computational Fluid Dynamics (CFD) simulations.
Wendong Zhang, Yang Cao, Zhong Qian, Jian Wang, Yixian Zhu, Yanan Yang, Yujie Wang, Guoqing Wu   +7 more
doaj   +1 more source

On the Propagation of Slip Fronts at Frictional Interfaces [PDF]

, 2012
The dynamic initiation of sliding at planar interfaces between deformable and rigid solids is studied with particular focus on the speed of the slip front.
C.H. Scholz, D. Coker, D. Coker, D.S. Amundsen, David S. Kammer, E. Bouchbinder, J. Scheibert, J. Trømborg, J.W.S. Rayleigh, Jean-François Molinari, K. Xia, M. Di Bartolomeo, O. Ben-David, O. Ben-David, O. Braun, P.J. Blau, Peter Spijker, S. Maegawa, S. Rubinstein, S.M. Rubinstein, T. Baumberger, T. Belytschko, T.H. Heaton, T.K. Caughey, Vladislav A. Yastrebov, Y. Ben-Zion   +25 more
core   +3 more sources

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

Advanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente, J. Nunes‐Pereira, A. P. Silva, P. N. B. Reis   +3 more
wiley   +1 more source