Results 71 to 80 of about 6,676 (235)

Dissipation of Turbulence in the Wake of a Wind Turbine [PDF]

Boundary-Layer Meteorology, 2014
The wake of a wind turbine is characterized by increased turbulence and decreased wind speed. Turbines are generally deployed in large groups in wind farms, and so the behaviour of an individual wake as it merges with other wakes and propagates downwind is critical in assessing wind-farm power production.
Lundquist, J. K., Bariteau, L.
openaire   +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

Differences in cluster and internal wake effects from mesoscale and large-eddy simulations off the US East Coast [PDF]

Wind Energy Science
Mesoscale simulations are increasingly used to estimate wake effects within and between large wind farms, despite limited validation for large-scale wake effects. This study evaluates the capabilities and limitations of mesoscale simulations in capturing
M. Sanchez-Gomez, G. Deskos, M. Optis, J. K. Lundquist, J. K. Lundquist, M. Sinner, G. Xia, W. Musial   +7 more
doaj   +1 more source

Wind tunnel investigation on the effect of the turbine tower on wind turbines wake symmetry

Wind Energy, 2017
AbstractIn wind farms, the wake of the upstream turbines becomes the inflow for the downstream machines. Ideally, the turbine wake is a stable vortex system. In reality, because of factors like background turbulence, mean flow shear, and tower‐wake interaction, the wake velocity deficit is not symmetric and is displaced away from its mean position. The
Fabio Pierella, Lars Sætran
openaire   +2 more sources

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

Modelling the aerodynamics of vertical-axis wind turbines in unsteady wind conditions

, 2013
Most numerical and experimental studies of the performance of vertical-axis wind turbines have been conducted with the rotors in steady, and thus somewhat artificial, wind conditions - with the result that turbine aerodynamics, under varying wind ...
Scheurich, Frank, Brown, Richard
core   +1 more source

Wake-tracking and turbulence modelling in computational aerodynamics of wind turbine aerofoils [PDF]

, 2009
This article addresses two modelling aspects of wind turbine aerofoil aerodyna-mics based on the solution of the Reynolds-averaged Navier–Stokes (RANS) equations.
Bonfiglioli, Aldo, A. ZANON, Campobasso, M, Bonfiglioni, A, Zanon, A, M. S. CAMPOBASSO, Bonfiglioli, A., Campobasso, Sergio, Minisci, Edmondo, E. MINISCI, Minisci, E., Zanon, A., Zanon, Alessandro, Campobasso, M.S.   +13 more
core   +1 more source

Experimental Study on the Influence of Wind Turbine Yaw on Wake Evolution

发电技术
ObjectivesThe wake of wind turbine affects the overall power output of wind farm. The analysis of wake characteristics is the key to study the influence of yaw control on wake.
ZHANG Lidong, TIE Hao, LIU Huiwen, LI Qinwei, TIAN Wenxin, ZHAO Xiuyong, CHANG Zihan   +6 more
doaj   +1 more source

Multi‐Strategy Synergy‐Based Differential Evolution for Large Wind Farm Layout Optimization

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Exploring clean energy alternatives to fossil fuels has become a major research focus worldwide. Wind energy is regarded as one of the most promising renewable energy sources due to its clean and sustainable nature. However, wake interactions among turbines significantly reduce power conversion efficiency, making wind farm layout optimization (
Haotian Li, Yifei Yang, Qiong Fu, Zhenyu Lei, Zhe Xu, Shangce Gao   +5 more
wiley   +1 more source

Predicting wind turbine blade loads using vorticity transport and RANS methodologies [PDF]

, 2009
Two computational methods, one based on the solution of the vorticity transport equation, and a second based on the solution of the Reynolds-Averaged Navier-Stokes equations, have been used to simulate the aerodynamic performance of a horizontal axis ...
Fletcher, Timothy M., Kim, Da Hye, Brown, Richard, Kwon, Oh Joon   +3 more
core   +1 more source