Laboratory testing of tidal turbine models is an essential tool to investigate hydrodynamic interactions between turbines and the flow. Such tests can be used to calibrate numerical models and to estimate rotor loading and wake development to inform the design of full scale machines and array layout. This dataset provides CAD files describing the outer geometry of a highly instrumented turbine model developed as part of the X-MED project funded by the EPSRC (EP/ J010235/1). The model has a 1.2m diameter, three bladed horizontal axis rotor and is bottom mounted. The dataset also includes data measured during tank test of the model. The dataset is associated with the article 'Design and manufacture of a bed supported tidal turbine model for blade and shaft load measurement in turbulent flow and waves' by Payne, Stallard and Martinez published in 2017 in Renewable Energy (doi: http://dx.doi.org/10.1016/j.renene.2017.01.068).
Model external geometry
The experimental model external geometry is provided by two CAD files (STL format). Nacelle_and_tower.stl corresponds to the stationary part and rotor.stl is the rotating part, including the blades.
Velocity data
The flow velocity data used to generate figure 18 of the article can be found in the file wake_flow_velocity.txt.
• The first column corresponds to the x location of the measurement point as a function of the rotor diameter (i.e. 0.1 correspond to 0.1D). The x axis corresponds to the flow main direction (perpendicular to the rotor disc) and is positive in the streamwise direction. The origin is located at the centre of the rotor disc.
• The second column corresponds to the y location of the measurement point as a function of the rotor radius (i.e. 0.1 correspond to 0.1R). The y axis is transverse to the flow and horizontal. The origin is located at the centre of the rotor disc.
• The third column corresponds to the z location of the measurement point as a function of the rotor radius (i.e. 0.1 correspond to 0.1R). The z axis is perpendicular to the flow and vertical. The origin is located at the centre of the rotor disc.
• The forth column corresponds to the streamwise velocity (i.e. the x component of the velocity) in m/s.
Thrust and torque coefficient data
The data used to generate figure 17 of the article can be found in the files CT_TI3.txt, CT_TI12.txt, CP_TI3.txt, CP_TI12.txt.
• CT_TI3.txt corresponds to the thrust coefficient data obtained in a flow of turbulence intensity of 3%
• CT_TI12.txt corresponds to the thrust coefficient data obtained in a flow of turbulence intensity of 12%
• CP_TI3.txt corresponds to the power coefficient data obtained in a flow of turbulence intensity of 3%
• CP_TI12.txt corresponds to the power coefficient data obtained in a flow of turbulence intensity of 12%
For the four files above the columns corresponds to the following:
• The first column is the mean tip speed ratio value
• The second column is the tip speed ratio standard deviation
• The third column is the coefficient mean value
• The forth column is the coefficient standard deviation
Turbine sensors time series
The data used to generate figure 16 of the article can be found in the file Turbine_sensors_timeseries.txt.
• The first column corresponds to the time stamp in second.
• The second column corresponds to the rotational velocity in rotation per minute.
• The third column corresponds to the rotor torque in Newton meter.
• The forth column corresponds to the rotor thrust in Newton.
• The fifth column corresponds to the rotor absolute angular position in degree.
• The sixth column corresponds to the streamwise root bending moment of blade 1 in Newton meter.
• The seventh column corresponds to the streamwise root bending moment of blade 2 in Newton meter.
• The eighth column corresponds to the streamwise root bending moment of blade 3 in Newton meter.