Results 11 to 20 of about 75,283 (262)
Inverse Aerodynamic Optimization Considering Impacts of Design Tip Speed Ratio for Variable-Speed Wind Turbines [PDF]
Energies, 2016 Because of the slow dynamic behavior of the large-inertia wind turbine rotor, variable-speed wind turbines (VSWTs) are actually unable to keep operating at the design tip speed ratio (TSR) during the maximum power point tracking (MPPT) process. Moreover,
Zhiqiang Yang +5 more
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Aerodynamic Separability in Tip Speed Ratio and Separability in Wind Speed- a Comparison [PDF]
Journal of Physics: Conference Series, 2014 From extensive application over a number of years, it has been established that the nonlinear rotor aerodynamics of typical medium and large wind turbines exhibit an effectively global separability property. Two versions of the separability of aerodynamic torque for variable speed wind turbines are investigated here; the separated function, related to ...
Gala Santos, M L +2 more
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Journal of Physics: Conference Series, 2022 Abstract In recent years, industrial controllers for modern wind turbines have been designed as a combined wind speed estimator and tip-speed ratio (WSE-TSR) tracking control scheme. In contrast to the conventional and widely used Kω 2 torque control strategy, the WSE-TSR scheme provides flexibility in terms of ...
Brandetti, L. (author) +5 more
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Modelling the Wind Turbine by Using the Tip-Speed Ratio for Estimation and Control
Energies, 2022 The development of dynamic models for control purposes is characterised by the challenge of finding a compromise between the minimum necessary information about the system dynamics contained in the model and a model with a low level of complexity such that the model-based control system design becomes comfortable.
Adrian Gambier, Yul Yunazwin Nazaruddin
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Energies, 2021 In this study, the performance of offshore wind turbines at low tip speed ratio (TSR) is studied using computational fluid dynamics (CFD), and the performance of offshore wind turbines at low tip speed ratio (TSR) is improved by revising the blade ...
Lin Pan +3 more
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Effects of the vertical axis wind turbine on the velocity field of the wake flow
Nihon Kikai Gakkai ronbunshu, 2014 This paper deals with the wake flow behind a vertical axis wind turbine, focusing on the variation in the wake structure relative to the tip-speed ratio λ.
Mami WATANABE +2 more
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Wake Expansion and the Finite Blade Functions for Horizontal-Axis Wind Turbines
Energies, 2021 This paper considers the effect of wake expansion on the finite blade functions in blade element/momentum theory for horizontal-axis wind turbines. For any velocity component, the function is the ratio of the streamtube average to that at the blade ...
David Wood
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Effects of end plates on performance of a small straight-bladed vertical axis wind turbine
Journal of Fluid Science and Technology, 2017 The time mean characteristics and the torque variation of the straight-bladed vertical axis wind turbine attached with various end plates were examined in wind tunnel experiments, and they were associated with the effect of the wing tip shape on the ...
Seiji YAMADA +2 more
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Analysis of Structural Responses of a Horizontal Axis Wind Turbine at Maximum Aerodynamic Performance [PDF]
Journal of Applied and Computational MechanicsThis numerical analysis investigates the interplay between fluid dynamics and structural mechanics within a horizontal axis wind turbine. Tip speeds ranging from 1 to 8.1 are explored, focusing on blade structural responses at maximum aerodynamic ...
Ahmed TAIBAOUI +2 more
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Numerical investigation of h-Darrieus wind turbine aerodynamics at different tip speed ratios
International Journal of Numerical Methods for Heat & Fluid Flow, 2023 Purpose The purpose of the paper is to predict the aerodynamic performance of a complete scale model H-Darrieus vertical axis wind turbine (VAWT) with end plates at different operating conditions. This paper aims at understanding the flow physics around a model VAWT for three different tip speed ratios corresponding to three different flow regimes ...
Venkatraman, Kartik +3 more
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