ABSTRACT:

In this study, the maximum water particle velocity, in the internal water duct of caisson structure embedding wave power generator, was investigated by CADMAS-SURF numerical modeling to determine the optimized shape of structure. It was considered that water oscillating turbine could be installed within the internal water duct in caisson structure. In this case, the water velocity in the duct is the main parameter of the turbine's power converting efficiency. Therefore, the maximum water velocity characteristics was investigated in various wave heights and periods on the variation of structure shape, specially OWC shape, the angle and the length of slope in front of structure.

INTRODUCTION

The oscillating water column is one of the most widely used wave energy converting system all over the world. Many efforts have been made in the research of the wave energy converting efficiency and operating performance as the oscillating water column system. In recent, an experiment was performed concentrating on the effects of several shape parameters of OWC chamber in a view of wave energy absorbing capability (Hong, Shin, Hong, Choi and Hong, 2007) and the integrated system of chamber and turbine for OWC wave energy converting facility was studied (Liu, Hyun, Hong, Lee and Jin, 2010). There are many studies in turbine types and energy converting types including OWC. However, most of OWC wave energy converting types including OWC. However, most of OWC wave energy converting studies are about the turbine of oscillating air in OWC and few attempts have been made on the turbine of oscillating water of OWC so far. Cho, Kim, Kim and Sim (2007) numerically analyzed the flushing effects and the likelihood of a vertical breakwater consist of immersed water channel and water chamber. This could be a research example of water turbine for wave energy converting.

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