针对滑行艇水动力特性的非定常预报方法及应用

基于RANS方法和VOF模型,建立滑行艇定常水动力特性预报方法。在此基础上,针对艉吃水量求解问题,结合6DOF模型和重叠网格技术,建立滑行艇非定常水动力特性预报方法。典型算例验证表明,该方法能有效预报滑行艇的阻力和艉吃水量,预报精度满足工程应用需求。进一步应用该方法分析某滑行艇艇型底部细节设计对水动力性能的影响,结果表明,该方法可有效指导滑行艇精细化设计,弥补传统设计方法的不足。

An Unsteady CFD Forecasting Method and Application of Hydrodynamic Characteristics of Planing Crafts

Based on the RANS method and the VOF model, a method of predicting the steady hydrodynamic characteristics of planing crafts is established. On the basis, for solving the aft draft, combining the 6DOF model and the overlap grid technology, the method that predicts the unsteady hydrodynamic characteristics of the planing crafts is established. The typical example shows that the method can effectively predict the resistance and the aft draft of the planing crafts. The forecast accuracy satisfies the needs of engineering applications. The method is further used to analyze the impact on the hydrodynamic performance of the planing crafts form design details at the bottom. The results show that the method can effectively guide the design of the sliding craft and improve the shortcomings of the traditional design method.