The hydrodynamic analysis of a new semi-small waterplane area twin hull (SWATH) suitable for various applications such as small and medium size passenger ferries is presented. This may be an attractive crossover con...The hydrodynamic analysis of a new semi-small waterplane area twin hull (SWATH) suitable for various applications such as small and medium size passenger ferries is presented. This may be an attractive crossover configuration resulting from the merging of two classical shapes: a conventional SWATH and a fast catamaran. The final hull design exhibits a wedge-like waterline shape with the maximum beam at the stem; the hull ends with a very narrow entrance angle, has a prominent bulbous bow typical of SWATH vessels, and features full stern to arrange waterjet propellers. Our analysis aims to perform a preliminary assessment of the hydrodynamic performance of a hull with such a complex shape both in terms of resistance of the hull in calm water and seakeeping capability in regular head waves and compare the performance with that of a conventional SWATH. The analysis is performed using a boundary element method that was preliminarily validated on a conventional SWATH vessel.展开更多
以DARPA(Defense Advanced Research Projects Agency)公开的Suboff潜艇模型作为鱼雷体并以NACA(National Advisory Committee for Aeronautics)翼型生成支柱构建了一艘斜支柱小水线面双体船.以此为基础,考虑黏性,通过求解RANS方程,系...以DARPA(Defense Advanced Research Projects Agency)公开的Suboff潜艇模型作为鱼雷体并以NACA(National Advisory Committee for Aeronautics)翼型生成支柱构建了一艘斜支柱小水线面双体船.以此为基础,考虑黏性,通过求解RANS方程,系统地和针对性地研究了浸深分别对高速斜支柱小水线面双体船鱼雷体和整船阻力的影响,揭示了不同航速下各阻力成分与浸深之间的关系.通过研究发现:浸深对高速斜支柱小水线面双体船阻力影响显著,航速越高,浸深对整船阻力的影响越显著;虽然在近水面由于兴波的存在,鱼雷体阻力随浸深的减小而增大,但是整船阻力还是随着浸深的减小而减小.展开更多
文摘The hydrodynamic analysis of a new semi-small waterplane area twin hull (SWATH) suitable for various applications such as small and medium size passenger ferries is presented. This may be an attractive crossover configuration resulting from the merging of two classical shapes: a conventional SWATH and a fast catamaran. The final hull design exhibits a wedge-like waterline shape with the maximum beam at the stem; the hull ends with a very narrow entrance angle, has a prominent bulbous bow typical of SWATH vessels, and features full stern to arrange waterjet propellers. Our analysis aims to perform a preliminary assessment of the hydrodynamic performance of a hull with such a complex shape both in terms of resistance of the hull in calm water and seakeeping capability in regular head waves and compare the performance with that of a conventional SWATH. The analysis is performed using a boundary element method that was preliminarily validated on a conventional SWATH vessel.
文摘以DARPA(Defense Advanced Research Projects Agency)公开的Suboff潜艇模型作为鱼雷体并以NACA(National Advisory Committee for Aeronautics)翼型生成支柱构建了一艘斜支柱小水线面双体船.以此为基础,考虑黏性,通过求解RANS方程,系统地和针对性地研究了浸深分别对高速斜支柱小水线面双体船鱼雷体和整船阻力的影响,揭示了不同航速下各阻力成分与浸深之间的关系.通过研究发现:浸深对高速斜支柱小水线面双体船阻力影响显著,航速越高,浸深对整船阻力的影响越显著;虽然在近水面由于兴波的存在,鱼雷体阻力随浸深的减小而增大,但是整船阻力还是随着浸深的减小而减小.