• Corpus ID: 59426768

Numerical modelling of two-scale flow dynamics

@inproceedings{Bonar2016NumericalMO,
  title={Numerical modelling of two-scale flow dynamics},
  author={Paul A. J. Bonar and Vengatesan Venugopal and Alistair G. L. Borthwick and Thomas A. A. Adcock},
  year={2016},
  url={https://api.semanticscholar.org/CorpusID:59426768}
}
Two-scale actuator disc theory is shown to predict qualitatively the performance of a lateral array of tidal turbines in a depth-averaged channel model. The agreement between the numerical and analytical models is improved by extrapolating the numerical results to zero background roughness. Increasing background roughness is shown to reduce the optimal turbine spacing and increase the peak power coefficient of the array. 
users.ox.ac.uk
2 Citations
Background Citations
1
Methods Citations
1
Results Citations
1

Figures from this paper

2 Citations

On the arrangement of tidal turbines in rough and oscillatory channel flow

Fast tidal streams are a promising source of clean, predictable power, but the task of arranging tidal turbines for maximum power capture is complicated. Actuator disc models, such as the two-scale…

Toward best practice in the design of tidal turbine arrays

In recent years, much research has focused on the possibility of using arrays of turbines to generate clean and predictable power from tidal currents. The first such array is now in development but a…

10 References

Numerical validation of the two-scale actuator disc theory for marine turbine arrays

The challenge in the hydrodynamic modelling of tidal and marine turbine farms is to take into account the interaction of flow events across a wide range of scales, such as the blade scale, turbine…

Application of linear momentum actuator disc theory to open channel flow

This report presents a step by step extension of the simple one-dimensional linear momentum actuator disc theory (LMADT), which results in the well known Betz-Lanchester limit for wind turbines, to a…

Modelling tidal energy extraction in a depth-averaged coastal domain

An extension of actuator disc theory is used to describe the properties of a tidal energy device, or row of tidal energy devices, within a depth-averaged numerical model. This approach allows a…

Effect of free surface deformation on the extractable power of a finite width turbine array

The efficiency of an array of tidal turbines partially blocking a wide channel

Abstract A new theoretical model is proposed to explore the efficiency of a long array of tidal turbines partially blocking a wide channel cross-section. An idea of scale separation is introduced…

The available power from tidal stream turbines in the Pentland Firth

This paper assesses an upper bound for the tidal stream power resource of the Pentland Firth. A depth-averaged numerical model of the tidal dynamics in the region is set-up and validated against…

Tuning turbines in a tidal channel

As tidal turbine farms grow they interact with the larger scale flow along a channel by increasing the channel's drag coefficient. This interaction limits a channel's potential to produce power. A 1D…