The datasets contain the heave, pitch and roll displacements measured for an oscillating water column (OWC) spar buoy in a range of experiments detailed in [1,2]. 
Each set of experiments were repeated with the top of the OWC air chamber fully closed and opened, denoted as ClosedWEC and OpenWEC respectively, in the file names.
Three types of experiments were performed: free decay, regular wave and irregular wave. The results are sorted into three folders, corresponding to these three different experiment types.  

(1) Free decay - In total, 18 free decay experiments were performed. Three repeat experiments for each degree of freedom (heave, pitch and roll), for both the ClosedWEC and OpenWEC configurations. 

(2) Regular wave - 27 input wave frequencies were tested. The input wave series was first measured without the OWC Spar Buoy in the waveflume and is recorded in the file "FreeSurfaceElevation.csv". The measured body motions, when the OWC Spar Buoy was subjected to the input wave series, are sorted into six files, based on the three degrees of freedom (heave, pitch and roll) and the two WEC configurations (ClosedWEC and OpenWEC). 

(3) Irregular wave - 12 different input irregular wave series were tested, comprising the combination of three peak frequencies and four significant wave heights. For these tests, the free surface elevation was measured upwave from the OWC Spar Buoy during the experiment, rather than in a separate test in an empty tank. The measured free surface elevation is recorded in each file along with the measured body motions, for the 12 different wave series and the two different WEC configurations. 	



---Publications---
More information on the tests can be found in the following publications:

[1] Davidson, J., Gomes, R.P.F., Galeazzi, R. and Henriques, J.C.C., "Blowing the Top on Parametric Resonance: Relief Valve Control for the Stabilisation of an OWC Spar Buoy", In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers Digital Collection, 2020.

[2] Davidson, J., Henriques, J.C.C, Gomes, R.P.F. and Galeazzi, R., "Opening the air-chamber of an oscillating
water column spar buoy wave energy converter to avoid parametric resonance", IET Renewable Power Generation, 2021


---Acknowledgement---
This project has received funding from the European Union’s Horizon 2020 research and innovation
programme under the Marie Sklodowska-Curie grant agreement No 867453.