Results 41 to 50 of about 135,349 (273)
International Journal of Electrical Power & Energy SystemsWind turbines support grid frequency by rotor decelerating and then accelerating, but the instant power imbalance caused by rotor speed recovery may lead to a secondary frequency drop.
Zhiting Zhou +5 more
doaj +1 more source
Simulation study of helicopter ship landing procedures incoporating measured flow data [PDF]
, 2005 The aim of this article is to investigate the use of inverse simulation to help identify those regions of a ship's flight deck which provide the safest locations for landing a rotorcraft in various atmospheric conditions.
Galbraith, R. +7 more
core +1 more source
Observations of the Growth and Decay of Stall Cells during Stall and Surge in an Axial Compressor
International Journal of Rotating Machinery, 2017 This research investigated unsteady events such as stall inception, stall-cell development, and surge. Stall is characterized by a decrease in overall pressure rise and nonaxisymmetric throughflow.
Adam R. Hickman, Scott C. Morris
doaj +1 more source
Numerical Analysis of the Dynamic Interaction between Two Closely Spaced Vertical-Axis Wind Turbines
Energies, 2021 To investigate the optimum layouts of small vertical-axis wind turbines, a two-dimensional analysis of dynamic fluid body interaction is performed via computational fluid dynamics for a rotor pair in various configurations.
Yutaka Hara +3 more
doaj +1 more source
Journal of Marine Science and Engineering, 2023 The study of hydrodynamic characteristics of floating double-rotor horizontal axis tidal current turbines (FDHATTs) is of great significance for the development of tidal current energy. In this paper, the effect of roll motion on a FDHATT is investigated
Muyu Zhao, Ying Chen, Jin Jiang
doaj +1 more source
Máquina assíncrona trifásica de rotor bobinado duplamente alimentada por meio de transformador rotativo [PDF]
, 2011 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2011A máquina assíncrona trifásica é um equipamento extremamente difundido no universo das máquinas ...
Ruviaro, Maurício
core
Advanced Materials, EarlyView.Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang +5 more
wiley +1 more source
Angewandte Chemie, EarlyView.A coumarin‐based dual‐emission fluorophore was designed to visualize the maturation of protein liquid droplets. Upon covalent conjugation to droplet‐forming proteins, ratiometric fluorescence imaging allowed real time monitoring of droplet maturation. This probe is applicable to the analysis of droplet formation and maturation mechanisms, as well as to
Tomoya Yamamoto +6 more
wiley +2 more sources
电力工程技术After the frequency support of grid-forming permanent magnet synchronous generator-based wind turbines (GFWTs) is completed, it is necessary to promptly restore the physical rotor speed to enable the GFWTs to re-operate at the maximum power point ...
Xiaoming ZOU, Chenggen WANG, Yingjie HU
doaj +1 more source
Separations, 2023 The improper disposal of retired lithium batteries will cause environmental pollution and a waste of resources. In this study, a waste lithium iron phosphate battery was used as a raw material, and cathode and metal materials in the battery were ...
Huabing Zhu +4 more
doaj +1 more source