Results 121 to 130 of about 97,324 (334)
Parametric Analysis of Control Techniques for 15 MW Semi-Submersible Floating Wind Turbine
Applied SciencesIn this study, a composite control algorithm based on classical control methods is developed to achieve all control objectives, such as power production, load reduction, and motion reduction, for the floating wind turbine.
Taesu Jeon +4 more
doaj +1 more source
Study of Turbofan Engines Designed for Low Enery Consumption [PDF]
Subsonic transport turbofan engine design and technology features which have promise of improving aircraft energy consumption are described. Task I addressed the selection and evaluation of features for the CF6 family of engines in current aircraft, and ...
Hirschkron, R. +2 more
core +1 more source
Advanced Materials, EarlyView.This study shows that alkaline leaching of PrBa0.8Ca0.2Co2O5+δ under anodic bias selectively removes Ba and Ca, forming a cobalt‐rich and amorphous layer. The modified surface significantly boosts ORR activity, offering a simple and effective strategy to improve electrochemical device performance.
Yeongtaek Hong +11 more
wiley +1 more source
Unravelling the Secret of Sulfur Confinement and High Sulfur Utilization in Hybrid Sulfur‐Carbons
Advanced Materials, EarlyView.Thermal condensation of inverse vulcanized sulfur‐carbon hybrids enables a bottom‐up sulfur confinement strategy, in which a protective carbon phase is progressively constructed around sulfur species. The resulting carbon nanodomains covalently tether sulfur chains and stabilize radical intermediates. This integrated architecture effectively suppresses
Tim Horner +9 more
wiley +1 more source
Advances in Mechanical EngineeringThe compressor blades in gas turbines are subjected to long-term dynamic stress, and the blades sustain a certain degree of damage. This high-cycle fatigue damage of the blade accumulates to a certain extent, the crack will appear.
Guofang Nan, Ying Wang, Xu Chen, Xia Yao
doaj +1 more source
An Analysis on Vibratory Loads Reduction using Individual Blade Control in Active Helicopter Rotors
Journal of the Korean Society for Aeronautical & Space Sciences, 2007 the present paper, a new version of DYMORE, which is an analysis to solve a nonlinear multi-body dynamics problem, is used to simulate an Individual Blade Control (IBC) algorithm in order to reduce vibration in helicopter rotors. The Active Twist Rotor (ATR), in which Active Fiber Composites (AFC) are embedded, is utilized for IBC.
openaire +2 more sources
NASA propeller noise research [PDF]
, 1980 The research in propeller noise prediction, noise/performance optimization, and interior reduction is described. Selected results are presented to illustrate the status of the technology and the direction of future ...
Greene, G. C.
core +1 more source
Advanced Materials, EarlyView.Drawing inspiration from the layered hard‐soft architecture found in sea sponges, this work establishes a new framework for architected cementitious composites (ACC) through multi‐material additive manufacturing (MMAM) process. The integration of mortar and elastomer phases into layered architectures enables synergistic toughening mechanisms, including
Aimane Najmeddine +5 more
wiley +1 more source
Structural characteristic analysis of new type bend-twist coupling blades of large wind turbine
Jixie qiangduIn order to study the structural performance of the new bend-twist coupling blade, NREL 5 MW blade was taken as the prototype, and the geometric model of the blade was established by using NX Open Grip parameterization language.
WANG HaiSheng +4 more
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