Experimental Study on Wave Interactions with a Fixed Rectangular Barge in a Beam Sea

摘要

This paper presents an experimental study on wave interactions with arectangular barge in a beam sea condition. Regular waves with a waveperiod the same as the natural frequency of the barge were used in theexperiments due to the fact that the barge is prone to capsizing undersuch waves. The barge was fixed on the free surface and no waveovertopping was assumed. Particle Image Velocimetry (PIV) wasemployed to measure the full-field two-dimensional velocity. Since theflow is highly turbulent, the phase-averaging technique was used to theextract the mean flow and turbulence properties. The mean flowpattern, including velocity, vorticity, and streamline, was analyzed toquantify the mechanism of the interactions. The generation andevolution of vorticity and turbulence kinetic energy were demonstrated.The turbulent kinetic energy is found to highly correlate with thevorticity field.