Abstract Existing physical model test data indicate that negative-deadrise planing surfaces may be capable of producing greater lift and lift-to-drag ratios than positive-deadrise planing surfaces. However, there is a lack of systematic experiments in which deadrise is varied with all other parameters are fixed. In this study, computational fluid dynamics software STAR-CCM+ is applied to simulate fixed-attitude prismatic planing hulls with variable deadrise, including positive and negative angles. Mesh dependency study and comparison with experimental data have been performed. The main reported hydrodynamic characteristics include the lift and drag coefficients, wetted area, and center of pressure. The negative-deadrise hulls are found to possess higher lift capabilities, while the highest lift-drag ratio is achieved by the zero-deadrise hull. With elimination of side wetting on negative-deadrise hulls, their efficiencies can be significantly increased.

中文翻译：

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负死角平面的流体动力学

摘要 现有物理模型试验数据表明，负静升平面可能比正静升平面产生更大的升力和升阻比。然而，缺乏系统实验，其中死角随所有其他参数固定而变化。在本研究中，应用计算流体动力学软件 STAR-CCM+ 模拟具有可变死角（包括正角和负角）的固定姿态棱柱滑行船体。已经进行了网格依赖性研究和与实验数据的比较。主要报告的流体动力学特性包括升力和阻力系数、润湿面积和压力中心。发现负死角船体具有更高的升力能力，而零死角船体实现了最高的升阻比。