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Publications
Muduli, R., Karmakar, D. and Guedes Soares, C. (2024), Performance analysis of freely heaving U-OWC integrated with II-shaped breakwater using Boundary Element Method, Advances in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, pp. 469-476.
In the present study, a free heave-only U-shaped OWC device integrated with a Ð-shaped breakwater is analysed considering three different OWC chamber bottom profiles. The hydrodynamic performance is assessed on analysing the theoretical maximum efficiency, radiation susceptance and conductance coefficients. The influence of the draft of U-OWC and width of internal chamber on the hydrodynamic performance is analysed using Boundary Element Method (BEM). The peak efficiency is observed when resonance occurs as observed in the case with traditional OWC devices. Moreover, the radiation susceptance coefficient (indicative of energy left unutilised) is noted to be zero at peak efficiency and the radiation conductance coefficient (indicative of energy transferred into the system) is noted to have peak values. The study found that, irrespective of the chamber bottom profile, on increasing the width of the “U” channel, the energy conversion efficiency of the U-OWC gets diminished but increasing the width of the internal chamber enhances the efficiency of the device. A larger draft resulted in better efficiency of the device, which is intuitively expected, however a draft 0.75h is preferable than a draft of 0.9h as both configurations have almost similar performance.
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