Numerical Prediction of the Vertical Responses of Planing Hulls in Regular Head Waves

• Main Authors: Emre Kahramanoğlu, Ferdi Çakıcı, Ali Doğrul
• Format: Article
• Language: English
• Published: MDPI AG 2020-06-01
• Series: Journal of Marine Science and Engineering
• Subjects: CFD; overset mesh; planing hull; seakeeping; vertical motions
• Online Access: https://www.mdpi.com/2077-1312/8/6/455

The evaluation of the hydrodynamic performance of planing vessels has always been one of the most attractive study fields in the maritime agenda. Resistance and self-propulsion studies have been performed using experimental and numerical methods by researchers for a long time. As opposed to this, the seakeeping performance of planing hulls is assessed with 2D approximation methods, but limitedly, while the experimental campaign is not cost-effective for several reasons. With this motivation, pitch and heave transfer functions and accelerations were obtained for a monohedral hull and a warped hull using a state of art commercial Reynolds-averaged Navier–Stokes (RANS) solver, in this study. Moreover, 2-DOF (degree of freedom) dynamic fluid–body interaction (DFBI) equations were solved in a coupled manner with an overset mesh algorithm, to find the instantaneous motion of the body. After verification, obtained numerical results at three different Froude numbers and a sufficiently large wave frequency range were compared with the experiments. The results showed that the employed RANS method offers a very accurate prediction of vertical motions and accelerations for planing hulls.