Publications

Showing 3 out of 82 publications matching your search

Improving tidal turbine efficiency using winglets

The cost effectiveness of a tidal stream turbine can be improved by maximising the power extracted for a given rotor diameter. This paper presents a numerical and experimental study showing that winglets could be used to this end. The numerical simulations were conducted using Tornado, a vortex lattice code, which can model the interaction between different spanwise sections unlike Blade Element Momentum methods. Tornado was used to identify the important winglet design parameters such as dihedral angle. Tornado cannot capture viscous effects and so an experimental study was conducted on four designs. These were tested on a small-scale horizontal axis turbine in the Ifremer flume tank. The impact of winglets on the blade spanwise flow was found to have a significant effect on the amount of loss generated. The inviscid code used in this paper could complement existing quasi-3D design tools.

Authors:

Young, A. , Smyth, A., Bajpai, V., Augarde, R., Farman, J., and Sequeira, C.

Publication:

In proceedings from the 13th European Wave and Tidal Energy Conference, Napoli, Italy

Wireless RF telemetry for rotating frame data acquisition and control

Obtaining measurements in the rotating frame of reference requires either real-time communication between the rotating and stationary frames, or temporary data storage in the rotating frame. Rotating telemetry systems must be low-noise and high-bandwidth, which is hard to achieve using traditional slip-ring arrangements, while using temporary data storage introduces synchronisation issues. In this paper, the use of wireless telemetry for real-time data acquisition is demonstrated for two applications: tidal turbine load control and large-scale turbine pressure measurements.

Authors:

Farman, J.R.

Publication:

In proceedings of the XXIII Biannual Symposium on Measuring Techniques in Turbomachinery

DOI:

https://doi.org/10.17863/CAM.40671

Load alleviation technology for extending life in tidal turbines

Authors:

Young, A., Farman, J., and Miller, R.

Publication:

In proceedings of the International Conference on Renewable Energies Offshore, Lisbon, Portugal