Comparison of three different turbine designs in unsteady flow conditions

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.

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.

Disciplines

Cross-discipline

Keywords

horizontal axis tidal turbine, performance comparison, wave and current interactions, laser doppler velocity measurements, particle image velocimetry, wave gauges

Location

50.72892N, 50.72892S, 1.59796E, 1.59796W

Devices

Plaese see the ReadMe file for a detailed description of the test setup.

Data

FileSizeFormatProcessingAccess
Two components LDV files
235 MoTEXTQuality controlled data
Three components LDV files
69 MoTEXTQuality controlled data
Turbine, load-cell and wave gauges data
507 MoTEXTQuality controlled data
PIV data for run numbers 41 to 47
1 GoTEXTQuality controlled data
PIV data for run numbers 48 to 54
1 GoTEXTQuality controlled data
PIV data for run numbers 55 to 59
3 GoTEXTQuality controlled data
PIV data for run numbers 60 to 65
4 GoTEXTQuality controlled data
PIV data for run numbers 66 to 71
4 GoTEXTQuality controlled data
PIV data for run numbers 72 to 75
3 GoTEXTQuality controlled data
PIV data for run numbers 179 to 183
6 GoTEXTQuality controlled data
PIV data for run numbers 184 to 186
3 GoTEXTProcessed data
ReadMe file
4 MoPDF
How to cite
Smyth Amanda, Young Anna, Gaurier Benoit, Germain Gregory, Facq Jean-Valery, Bacchetti Thomas (2021). Comparison of three different turbine designs in unsteady flow conditions. SEANOE. https://doi.org/10.17882/78902

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