Hydrodynamics of planing surfaces with negative deadrise angles
Hydrodynamics of planing surfaces with negative deadrise angles
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DOI：
10.1016/j.oceaneng.2020.107601
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发表时间：
2020-09
影响因子：
5
通讯作者：
K. Matveev;M. Morabito
中科院分区：
文献类型：
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作者：
K. Matveev;M. Morabito
现有的物理模型试验数据表明，负死升面可能比正死升面产生更大的升力和升阻比。但是，在其它参数不变的情况下，还没有系统的实验来证明死升是变化的。本研究采用计算流体力学软件STAR-CCM+，对正、负两种不同死角的定姿棱柱形平面船体进行了数值模拟。进行了网格依赖性研究，并与实验数据进行了对比。报道的主要流体动力特性包括升力和阻力系数、润湿面积和压力中心。研究发现，负死升船体具有更高的升力，而最高的升阻比是由零死升船体实现的。由于消除了负水位线船体的侧湿，它们的效率可以显着提高。
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.