85 citations · 191 across the 12 of their papers we have counts for
12 papers
An analytical model of momentum availability for predicting large wind farm power
Andrew Kirby, Thomas D. Dunstan, Takafumi Nishino
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…
Data-driven modelling of turbine wake interactions and flow resistance in large wind farms
Andrew Kirby, François-Xavier Briol, Thomas D. Dunstan +1
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…
Two-scale interaction of wake and blockage effects in large wind farms
Andrew Kirby, Takafumi Nishino, Thomas D Dunstan
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 larg…
Performance and wake characteristics of tidal turbines in an infinitely large array
Pablo Ouro, Takafumi Nishino
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 accelerati…
Two-scale momentum theory for time-dependent modelling of large wind farms
Takafumi Nishino, Thomas D. Dunstan
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 tw…
Generalisation of the two-scale momentum theory for coupled wind turbine/farm optimisation
Takafumi Nishino
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…
Tuning turbine rotor design for very large wind farms
Takafumi Nishino, William Hunter
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…
Two-scale momentum theory for very large wind farms
Takafumi Nishino
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…
Limits to the power density of very large wind farms
Takafumi Nishino
A simple analysis is presented concerning an upper limit of the power density (power per unit land area) of a very large wind farm located at the bottom of a fully developed bounda…
Energetics of marine turbine arrays - extraction, dissipation and diminution
Takafumi Nishino, Richard H. J. Willden
A two-scale modelling approach is discussed to predict the performance and energetics of a large number (more than a few hundred) of marine turbines installed as a power farm in a…
Beyond the Betz Theory - Blockage, Wake Mixing and Turbulence
Takafumi Nishino
Recent analytical models concerning the limiting efficiency of marine hydrokinetic (MHK) turbines are reviewed with an emphasis on the significance of blockages (of local as well a…
Low-Order Modelling of Blade-Induced Turbulence for RANS Actuator Disk Computations of Wind and Tidal Turbines
Takafumi Nishino, Richard H. J. Willden
Modelling of turbine blade-induced turbulence (BIT) is discussed within the framework of three-dimensional Reynolds-averaged Navier-Stokes (RANS) actuator disk computations. We fir…