A study on hydrodynamic characteristics of a planing hull by CFD simulation and modified M-S method

ABSTRACT

Predicting the motion of planing hulls accurately is significant in the improvement of hydrodynamic performance. In this paper, a new semi-empirical method based on Morabito’s empirical equations (named modified M-S method) is developed to predict the attitude and resistance of planing hulls in calm water. Moreover, the hydrodynamic characteristics of a planing hull with free sinkage and trim conditions are comprehensively investigated by the dynamic overset mesh method and rotation and translation method. The numerical simulation is based on the Reynolds-Averaged Navier-Stokes (RANS) equation with the SST k-ω turbulence model. And the interface of a two-phase flow is captured by the Volume of Fluid (VOF) scheme. The numerical results obtained by overset mesh method and rotation and translation method, the modified M-S method, and the Savitsky method are compared with experimental data, which shows good agreement.

KEYWORDS:

• Planing hull
• modified M-S method
• pressure distributions
• overset mesh method
• rotation and translation method
• hydrodynamic lift force

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 51579147] and the YEQISUN Joint Funds of the National Natural Science Foundation of China [grant number U2141228].