Results 31 to 40 of about 2,501 (164)
Anais da Academia Brasileira de Ciências, 2015 The Diffuser Augmented Wind Turbines (DAWTs) have been widely studied, since the diffusers improve the power coefficient of the wind turbine, particularly of small systems.
DISTERFANO L.M. BARBOSA +5 more
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Flow physics beyond the Betz limit
, 2023 A pivotal theoretical result of the early 20th century demonstrated that the limit of energy extraction for a wind or tidal stream turbine from an unconstrained flow is 16/27 of the upstream kinetic flux passing through the turbine area, known as the ‘Betz Limit’.
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Power Coefficient for Large Wind Turbines Considering Wind Gradient Along Height
EnergiesThe Betz constant is the well-known aerodynamic limit of the maximum power which can be extracted from wind using wind turbine technologies, under the assumption that the wind speed is uniform across a blade disk. However, this condition may not hold for
Saroj Biswas, Jim Shih-Jiun Chen
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Non-Empirical BEM Corrections Relating to Angular and Axial Momentum Conservation
Energies, 2019 The Blade-Element Momentum (BEM) model for Horizontal-Axis Wind Turbines (HAWTs), although extremely useful, is known to be approximate due to model formulation insufficiencies, for which add-ons and corrections have been formulated over the past many ...
Søren Hjort
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Variable Pitch Darrieus Water Turbines
Journal of Fluid Science and Technology, 2008 In recent years the Darrieus wind turbine concept has been adapted for use in water, either as a hydrokinetic turbine converting the kinetic energy of a moving fluid in open flow like an underwater wind turbine, or in a low head or ducted arrangement ...
Brian KIRKE, Leo LAZAUSKAS
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A Multi-Element Diffuser Augmented Wind Turbine
Energies, 2014 A new class of diffuser augmented wind turbines (DAWTs) is presented. The new diffuser concept exploits aero-dynamic principles for the creation of high-lift airfoil configurations known from the aircraft industry.
Søren Hjort, Helgi Larsen
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Clinical Anatomy, EarlyView.ABSTRACT A novel anatomical description and radiological finding, related to the anatomical course of the terminal fibular artery (FibA) was recently reported. In the article, the authors found the terminal FibA to change its course, from being posterior and medial to the fibula to surface anteriorly and laterally before residing below the tibiofibular
Sebastian Kirdar‐Smith +5 more
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The Career Development Quarterly, EarlyView.ABSTRACT Drawing on the social cognitive model of career self‐management, the present study examines the relationships among decisional support, learning experiences (i.e., mastery experiences, verbal persuasion, vicarious learning, positive emotions, and negative emotions), self‐efficacy, and outcome expectations in relation to career exploration and ...
Ersoy Carkit
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Non‐uniform velocity distribution effect on the Betz–Joukowsky limit
Wind Energy, 2012 ABSTRACTA simple analytic correction is derived for the maximum efficiency of an ideal wind turbine rotor, the Betz–Joukowsky limit. The analytic correction accounts for the effect that the non‐uniform atmospheric boundary layer velocity distribution has on the Betz–Joukowsky derivation.
Leonardo P. Chamorro, R.E. A Arndt
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