Results 11 to 20 of about 2,810 (193)

The Betz–Joukowsky limit: on the contribution to rotor aerodynamics by the British, German and Russian scientific schools

Wind Energy, 2011
ABSTRACTThe derivation of the efficiency of an ideal wind turbine has been attributed to the three famous scientists of the three aerodynamic research schools in Europe during the first decades of the previous century: Lanchester, Betz and Joukowsky. However, detailed reading of their classical papers has shown that Lanchester did not accept Froude's ...
Valery L. Okulov, Gijs A.M. van Kuik
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Wind Turbine Power: The Betz Limit and Beyond [PDF]

, 2012
With a severe energy crisis facing the modern world, the production and utilization of ener‐ gy has become a vital issue, and the conservation of energy has acquired prime importance. Energy production and consumption are directly related to everyday life in much of human society, and issues of energy research are extremely important and highly ...
Mahmoud Huleihil, Gedalya Mazor
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Power Coefficient for Large Wind Turbines Considering Wind Gradient Along Height

Energies
The 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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Maximum Efficiency of a Wind Turbine

Undergraduate Journal of Mathematical Modeling: One + Two, 2016
The concept of a wind turbine is not new technology, however, in a day and age where renewable energy is popular, the interest in wind turbines has increased dramatically.
Marisa Blackwood
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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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A Study of a Darrieus Vertical Axis Wind Turbine with a guiding nozzle [PDF]

E3S Web of Conferences, 2020
This paper presents the results from an experimental study of a Vertical Axis Wind turbine model with a guiding nozzle. The geometry of the nozzle is synthesized by an original methodology.
Obretenov Valentin, Tliev Rossen
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Optimal performance of actuator disc models for horizontal-axis turbines

Frontiers in Energy Research, 2022
This study analyzes actuator disc (AD) models of horizontal-axis turbines to determine optimal performance, defined as the maximum power extracted at any tip speed ratio.
David H. Wood, Mohamed M. Hammam
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Physical limits of wind energy within the atmosphere and its use as renewable energy: From the theoretical basis to practical implications

Meteorologische Zeitschrift, 2021
How much wind energy does the atmosphere generate, and how much of it can at best be used as renewable energy? This review aims to give physically-based answers to both questions, providing first-order estimates and sensitivities that are consistent with
Axel Kleidon
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The Betz limit and the corresponding thermodynamic limit

Wind Engineering, 2022
The Betz’s limit for the maximum efficiency of an ideal wind turbine imposes a maximum value of about 60% on the conversion of the kinetic energy of an airflow into work. In this paper, we analyze the reason for this value because, from a thermodynamic point of view, it can be 100%.
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An Exploration of Wind Energy

Undergraduate Journal of Mathematical Modeling: One + Two, 2020
Wind energy is renewable energy extrapolated from the wind that has the potential to revolutionize our power supply in the near future as fossil fuels become outdated.
Bianca De Haan
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