Comparison of three different turbine designs in unsteady flow conditions
|Temporal extent||2020-12-14 -2020-12-18|
|Author(s)||Smyth Amanda1, Young Anna2, Gaurier Benoit3, Germain Gregory3, Facq Jean-Valery3, Bacchetti Thomas3|
|Affiliation(s)||1 : University of Oxford, Department of Electrical and Mechanical Engineering, United Kingdom
2 : University of Bath, Department of Mechanical Engineering, United Kingdom
3 : Ifremer, Laboratoire Comportement des Structures en Mer, Boulogne-sur-mer, France
|Note||MaRINET 2, call 4, project 4017: Fatigue Loading from Unsteady Flow Features (FLUFF)|
|Keyword(s)||horizontal axis tidal turbine, performance comparison, wave and current interactions, laser doppler velocity measurements, particle image velocimetry, wave gauges|
The purpose of the experiments is to compare how three different turbine designs perform in unsteady flow conditions: in turbulence and in surface waves, generated in the wave and current flume tank of Ifremer at Boulogne-sur-mer. An additional objective is to characterise the unsteady inflow conditions, and correlate them to the measured turbine loads.
The turbine performance is measured in steady and unsteady flow, through torque and thrust transducers. The inflow is characterised through 2-components and 3-components LDV systems and PIV measurements. The two LDV systems are used to take simultaneous 2-point measurements of the turbulent flow, at several locations in the turbine plane. This is done in an empty tank, i.e. when the turbine is not deployed. The purpose is to measure the spatial correlation of turbulent gusts in the turbine plane, by measuring at two locations simultaneously.
When the turbine is deployed, one velocity measurement point (using the 2-components LDV) is always acquired upstream of the turbine hub and in synchronization with the turbine parameters. Time-resolved PIV recording at 15 Hz is used to measure the flow adjacent to the turbine when operating in turbulence. The PIV plane includes the upper half of the turbine diameter, i.e. the edge of the turbine nose is just visible on the bottom right side of the PIV plane. These PIV measurements are acquired in synchronization with the turbine parameters.
These LDV and PIV measurements enable the correlation and the coherence between the inflow characteristics and the turbine parameters to be processed.
|Utilisation||Data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of data. Data are intended to be research-quality and include estimates of data quality and accuracy, but it is possible that these estimates or the data themselves contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data, data quality, and data accuracy accordingly. Authors welcome users to ask questions and report problems.|
|Acknowledgements||This MaRINET 2 project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement N. 731084.|
Plaese see the ReadMe file for a detailed description of the test setup.