Zobrazeno 1 - 10
of 110
pro vyhledávání: '"Nishino, Takafumi"'
Turbine-wake and farm-atmosphere interactions influence wind farm power production. For large offshore farms, the farm-atmosphere interaction is usually the more significant effect. This study proposes an analytical model of the `momentum availabilit
Externí odkaz:
http://arxiv.org/abs/2306.08088
Turbine wake and local blockage effects are known to alter wind farm power production in two different ways: (1) by changing the wind speed locally in front of each turbine; and (2) by changing the overall flow resistance in the farm and thus the so-
Externí odkaz:
http://arxiv.org/abs/2301.01699
Turbine wake and farm blockage effects may significantly impact the power produced by large wind farms. In this study, we perform Large-Eddy Simulations (LES) of 50 infinitely large offshore wind farms with different turbine layouts and wind directio
Externí odkaz:
http://arxiv.org/abs/2207.03148
Autor:
Ouro, Pablo, Nishino, Takafumi
The efficiency of tidal-stream turbines in a large array depends on the balance between negative effects of turbine-wake interactions and positive effects of bypass-flow acceleration due to local blockage, both of which are functions of the layout of
Externí odkaz:
http://arxiv.org/abs/2101.03829
Akademický článek
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Autor:
Nishino, Takafumi, Dunstan, Thomas D.
Publikováno v:
Journal of Fluid Mechanics 894 (2020) A2
This paper presents a theory based on the law of momentum conservation to define and help analyse the problem of large wind farm aerodynamics. The theory splits the problem into two sub-problems; namely an 'external' (or farm-scale) problem, which is
Externí odkaz:
http://arxiv.org/abs/1909.11449
Autor:
Nishino, Takafumi
An extended theoretical approach is proposed to predict the average power of wind turbines in a large finite-size wind farm. The approach is based on the two-scale momentum theory proposed recently for the modelling of ideal very large wind farms, bu
Externí odkaz:
http://arxiv.org/abs/1806.01562
Autor:
Nishino, Takafumi, Hunter, William
A new theoretical method is presented for future multi-scale aerodynamic optimisation of very large wind farms. The new method combines a recent two-scale coupled momentum analysis of ideal wind turbine arrays with the classical blade-element-momentu
Externí odkaz:
http://arxiv.org/abs/1803.03984
Autor:
Nishino, Takafumi
A new theoretical approach is proposed to predict a practical upper limit to the efficiency of a very large wind farm. The new theory suggests that the efficiency of ideal turbines in an ideal very large wind farm depends primarily on a non-dimension
Externí odkaz:
http://arxiv.org/abs/1605.00816
Autor:
Nishino, Takafumi
A combined experimental, computational and theoretical study is presented on the dynamics and stability characteristics of turbulent flow past a circular cylinder placed near and parallel to a moving ground. The study consists of four main parts: (i)
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442864