Results 61 to 70 of about 579 (191)

Interaction Between Vortex‐Induced Vibrations and Base Vibrations in Piezoelectric Harvesters

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In the present era, powering sensors using green energy is a significant challenge. One promising solution for the power supply of small sensors relies on piezoelectric energy harvesters excited by vortex‐induced vibrations (VIVs) generated by wind.
Michele Tonan, Ilaria Palomba, Alberto Pasetto, Alberto Doria   +3 more
wiley   +1 more source

Sharing landscapes with wildlife: Conflict and coexistence between high nature value pastoral systems and large carnivores

People and Nature, EarlyView.
Abstract High nature value (HNV) pastoral systems, that is those maintained by herding, transhumance and extensive grazing practices, are recognised as cornerstones of European biodiversity, cultural heritage and ecosystem service provision. Yet these systems are currently under significant pressure from a range of economic, social and environmental ...
Katrina Marsden, Hanna Pettersson, Tasos Hovardas, Ângela Lomba, Tobias Plieninger, Valeria Salvatori, Camilla Sandström, Juliette Young   +7 more
wiley   +1 more source

Experimental Investigation of the Unsteady Stator/Rotor Wake Characteristics Downstream of an Axial Air Turbine

International Journal of Turbomachinery, Propulsion and Power, 2021
A feasibility study of velocity field measurements using the Particle Image Velocimetry (PIV) method in an axial air turbine model is presented. The wakes past the blades of the rotor wheel were observed using the PIV technique.
Daniel Duda, Tomáš Jelínek, Petr Milčák, Martin Němec, Václav Uruba, Vitalii Yanovych, Pavel Žitek   +6 more
doaj   +1 more source

Thermoplastic‐Resin Transfer Molding Technology: Development and Challenges Toward Industrialization

Polymer Composites, EarlyView.
Illustration of the key aspects involved in the manufacture of thermoplastic composites by T‐RTM highlighting the relationships between raw materials, resin mixing strategies, polymerization parameters, and processing equipment ranging from laboratory to industrial scale. ABSTRACT Driven by increasingly stringent international environmental regulations,
Filipe P. Martins, Paulo S. Lima, Ricardo Torcato, Laura Santos, J. M. Oliveira   +4 more
wiley   +1 more source

umerical simulation of atmospheric boundary layer and wakes of horizontal-axis wind turbines

Journal of Energy in Southern Africa, 2017
Simulations of wind turbine wakes are presented in this paper using the three-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations employing the k-e turbulence model appropriately modified for the atmospheric flows.
Ali M. AbdelSalam, Ramalingam Velraj
doaj   +1 more source

A Review on the Meandering of Wind Turbine Wakes [PDF]

Energies, 2019
Meandering describes the large-scale, low frequency motions of wind turbine wakes, which could determine wake recovery rates, impact the loads exerted on turbine structures, and play a critical role in the design and optimal control of wind farms. This paper presents a comprehensive review of previous work related to wake meandering. Emphasis is placed
Xiaolei Yang, Fotis Sotiropoulos
openaire   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

The impact of far-reaching offshore cluster wakes on wind turbine fatigue loads [PDF]

Wind Energy Science
With the number of commissioned and planned wind farms increasing rapidly, analysing wind farm cluster wakes becomes essential for resource assessment and lifetime considerations.
A. Anantharaman, A. Anantharaman, J. Schneemann, J. Schneemann, F. Theuer, F. Theuer, L. Beaudet, V. Bernard, P. Deglaire, M. Kühn, M. Kühn   +10 more
doaj   +1 more source

National Policy Coherence Counts for Reducing Inequality in Global Climate and Development Agendas

Sustainable Development, EarlyView.
ABSTRACT International institutions promote policy coherence as crucial to the effective and fair implementation of global sustainability agendas, though the evidence for its benefits is slim. We present here the first systematic cross‐country dataset on the consequences of national government efforts to promote policy coherence for vulnerable groups ...
Katherine Browne, Adis Dzebo, Zoha Shawoo, Mario Cardenas, Pierrick Chalaye, Alexia Faus Onbargi, Cassilde Muhoza, Patricia Nicdao, Nokwethaba Makhanya, Navam Niles, Priyatma Singh   +10 more
wiley   +1 more source

From dusk till dawn: ecoacoustic monitoring reveals wind energy impacts on roding Eurasian woodcock Scolopax rusticola

Wildlife Biology, EarlyView.
Renewable energy is vital for reducing carbon emissions and yet its infrastructure poses challenges to biodiversity. While the impacts of wind power on bats and raptors are well‐studied, the effects on elusive species remain largely unknown. The Eurasian woodcock Scolopax rusticola, a nocturnal forest bird, performs characteristic courtship flights at ...
Jan O. Engler, Michael Bokämper, Stefan Hannabach, Manuela Merling de Chapa, Lena Daum, Kostadin B. Georgiev, Simon Thorn   +6 more
wiley   +1 more source