MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...

CHAPTER 5. PROPOSED EXPERIMENTAL SET-UP AND MEASUREMENTSimilar to the numerical model, the diffraction problem can be experimentally studied for atwo-dimensional, single, heaving body impinged by linear, regular, harmonic waves. Theexperimental set-up has been assembled. However, data have not been collected due to timeconstraints. Therefore, the goal of this chapter is to serve as a guideline for future research inthis area.5.1 Experimental ProcedureThe excitation force in the heave direction can be measured using a load cell. The excitationforce measured as the body’s curved face is positioned toward the wavemaker is denoted as0 ○ , as seen in Figure 5.1. The excitation force measured as the body’s curved face ispositioned away from the wavemaker is denoted 180 ○ , as seen in Figure 5.2. The excitationforce measured at 0 ○ is used to calculate the radiated wave amplitude at positive infinityusing Eq. (58). The excitation force measured at 180 ○ is used to calculate the radiated waveamplitude at negative infinity again using Eq. (58). The maximum power absorptionefficiency is calculated with the radiated wave amplitudes at positive and negative infinityusing Eq. (79).83