Results 71 to 80 of about 13,230 (227)
Energies, 2023 In the present work, direct numerical simulation is employed to investigate the unsteady flow characteristics and energy performance of low-pressure turbines (LPT) by considering the blades aeroelastic vibrations and inflow wakes.
Mahdi Erfanian Nakhchi +2 more
doaj +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
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 +6 more
doaj +1 more source
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 +6 more
wiley +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
Green Developmentalism? The Political Economy of Hydropower in India in the 21st Century
Development and Change, EarlyView.ABSTRACT This article critically examines the political economy of hydropower in India since its global reconfiguration as ‘green energy’ in the early 2000s. While an opportune convergence of interests among key global, national and subnational stakeholders contributed to the greening of hydropower in India, this reframing did not produce the expected ...
Vasudha Chhotray, Harsh Vasani
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
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Financial Management, EarlyView.ABSTRACT We examine how mergers and acquisitions (M&As) enable firms to adapt to climate policy shocks. Exploiting the adoption of the Nitrogen Oxides (NOx) Budget Trading Program (NBP) across US states as an exogenous shock, we find that firms with NOx‐emitting plants subject to the NBP are more likely to engage in M&As, particularly through vertical ...
Samer Adra +3 more
wiley +1 more source
The impact of far-reaching offshore cluster wakes on wind turbine fatigue loads [PDF]
Wind Energy ScienceWith 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 +10 more
doaj +1 more source
Introducing a novel method to support polarized citizens to sustain political dialogue
Political Psychology, EarlyView.Abstract This article offers a novel quasi‐experimental method over two studies for exploring how individuals can navigate politically polarizing discussions to sustain dialogue. Study one (N = 28) involved in‐person, stimulus‐led interviews in England and Scotland to understand the dialogical political positions being adopted on the UK's post‐Brexit ...
Anthony English, Kesi Mahendran
wiley +1 more source