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Publications
Rezanejad, K. and Guedes Soares, C. (2014), “Numerical study of a large floating oscillating water column device using a 2D boundary element”, Developments in Maritime Transportation and Exploitation of Sea Resources, 2014, Guedes Soares, C. and López Peña F. (Eds.). Francis & Taylor Group, London, UK, pp. 951-960.
In the present study, the performance of floating oscillating water column in finite water depth is analysed based on the linearized water wave theory in the two dimensional Cartesian coordinate systems. In this regard, it is assumed that the compressibility of the air is small so that the air pressure at the turbine is the same as the uniformly distributed pressure just above the internal free surface. Further the turbine characteristics are assumed linear so that the pressure drop across the turbine is proportional to the volume flow through it. It is assumed that the floating oscillating water column is very large and has negligible motions and is therefore considered as fixed. The free surface inside the chambers is modelled as a non-plane wave surface. The boundary integral equation method is employed to solve the associated boundary value problem and the multi region concept is used to overcome the numerical errors due to the assumption of thin barriers. The numerical results are compared with the existing experimental results and analytical results and the accuracy of the numerical model is evaluated. Eventually, effects of the geometrical dimensions of the floating oscillating water column and harbour attached to the device are investigated.
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