In view of the problem that the number of meshes will be increased when the overset mesh method is used for the numerical calculation of the planing boat resistance, and additional errors will be introduced in the interpolation of the two sets of meshes, which will lead to the low calculation accuracy and efficiency, a mesh method of dynamic boundary realization -- the remesh method is introduced in this paper. First, CFD software STAR CCM+ is used to conduct numerical simulation of a model size planing boat with two mesh methods respectively. Through comparison of test results and uncertainty analysis, the numerical method is confirmed and verified. Then the remesh method is used to simulate the planing boat with different speeds. The comparison between the numerical calculation of model resistance and the experimental results shows that the method has better numerical accuracy. Lastly, that remesh method and overset mesh method are compared in the calculation precision and the calculation efficiency, and the calculation precision and calculation efficiency are both improved.
Planing boat is a high-speed craft which depends on the hydrodynamic pressure generated by the hull to support most of the body mass. As its excellent resistance performance at high speed has been widely used, the research on its resistance performance has also become the focus of domestic and foreign scholars (Han et al., 2013).
Azcueta et al. (2003, 2010) used commercial CFD software Comet and combined with the six-degree-of-freedom motion model to make a more in-depth study in the free motion simulation of planing boat. Caponnetto (2001, 2002) simulated the ambient flow field of the hard bilge planing boat and sought for the means to obtain the best resistance performance of the planing boat. Villa et al. (2009) studied the influence of wake plate and interceptor plate on hydrodynamic performance of planing boat with CD-Adapco software. Hongjian Cao (2008) made use of the software FLUENT to calculate and analyze the flow field characteristics of the steady flow around the planing boat during the hydrostatic direct navigation. Keqiang Chen et al. (2010) used FLUENT software to analyze the simplified model bottom pressure distribution of the planing boat, and improved the gliding surface form of planing boat. Wenju Jin et al. (2011) carried out a numerical analysis on the motion response of a two-dimensional simplified model of a planing boat in a uniform incoming flow using a hybrid mesh of structure and non-structure. Yumin Sun et al. (2012) proposed a 3D hydrodynamic numerical research method based on CFD technology for water splashing and multi-degree of freedom movement of planing boat. Wencai Dong et al. (2012) proposed a calculation method of planing boat resistance combined with RANS equation to solve the problems that the existing CFD method takes a long time to calculate the resistance of planing boat, the accuracy of the formula for estimating the resistance of planing boat is low and the scope of application is limited.
