Results 71 to 80 of about 251,691 (297)
The Anatomical Record, EarlyView.Abstract The middle Permian represents a critical interval in therapsid evolution, when gorgonopsians emerged as some of the first specialized apex predators within terrestrial ecosystems. Despite their significance, the early diversification of Gorgonopsia in Gondwana remains poorly understood due to scarcity and fragmentary material.
Zanildo Macungo +5 more
wiley +1 more source
ANALYSIS OF DYNAMIC LOAD STRENGTH OF WIND TURBINE ROOT BOLT UNDER TURBULENCE MODEL
Jixie qiangdu, 2021 As an important connecting and fastening part of wind turbine blade,blade root bolt plays an important role in the operation of wind turbine. In this paper,the connecting bolt between blade and pitch bearing of 2 MW wind turbine is taken as the research ...
HAN Wen, CHEN ChangZheng
doaj
Wind turbine blade end-of-life options: An eco-audit comparison
Journal of Cleaner Production, 2019 Wind energy has developed rapidly over the last two decades to become one of the most promising economical and green sources of renewable energy, responding to concerns about use of fossil fuels and increasing demand for energy. However, attention is now
Pu-xing Liu, Fanran Meng, C. Y. Barlow
semanticscholar +1 more source
Estimating the angle of attack from blade pressure measurements on the National Renewable Energy Laboratory phase VI rotor using a free wake vortex model : yawed conditions [PDF]
, 2009 Wind turbine design codes for calculating blade loads are usually based on a blade element momentum (BEM) approach. Since wind turbine rotors often operate in off-design conditions, such as yawed flow, several engineering methods have been developed to ...
Sant, Tonio +2 more
core +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT The present study applied the diffusion of innovation theory to investigate the rate of diffusion of renewable energy sources used by Europe's top professional football stadiums and the relationship with carbon neutrality. A discrete diffusion model estimated the diffusion of renewable energy to saturation, and a multivariate logistic ...
Chad S. Seifried +2 more
wiley +1 more source
FluidsThe leading-edge erosion of a wind turbine blade was tested using a whirling arm rain erosion tester, whose rotation rate is considerably higher than that of a full-scale wind turbine owing to the scale effect.
Nobuyuki Fujisawa, Hirokazu Kawabata
doaj +1 more source
Materials for Wind Turbine Blades: An Overview [PDF]
Materials, 2017 A short overview of composite materials for wind turbine applications is presented here. Requirements toward the wind turbine materials, loads, as well as available materials are reviewed. Apart from the traditional composites for wind turbine blades (glass fibers/epoxy matrix composites), natural composites, hybrid and nanoengineered composites are ...
Leon Mishnaevsky +5 more
openaire +3 more sources
, 2020 Blade bearings, also termed pitch bearings, are joint components of wind turbines, which can slowly pitch blades at desired angles to optimize electrical energy output.
Zepeng Liu, Long Zhang, J. Carrasco
semanticscholar +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT The transition to a circular economy (CE) has become a strategic priority for firms, yet empirical assessments of corporate circularity remain fragmented and heavily dependent on structured indicators or self‐reported metrics. This paper proposes a novel, text‐based circularity index derived from mandatory non‐financial statements of large ...
Giuseppe Pernagallo +2 more
wiley +1 more source
Assessment and calibration of the γ equation transition model for a wide range of Reynolds numbers at low Mach [PDF]
, 2017 The numerical simulation of flows over large-scale wind turbine blades without considering the transition from laminar to fully turbulent flow may result in incorrect estimates of the blade loads and performance.
Barakos, George +3 more
core +1 more source