载人潜器阻力性能的数值计算和模型试验及船型优化(英文)

Numerical Calculation and Model Test of Drag Performance and Hull Form Optimization on a Manned Submersible

采用多块结构化网格对某载人潜器模型周围计算区域进行网格离散,采用Realizablek-ε湍流模型对潜器周围绕流场进行数值模拟。在船模拖曳水池中进行载人潜器模型不同艏向角和垂直上升及下潜航行时的阻力试验。将阻力的数值计算结果与试验值进行对比,两者的偏差在可接受范围内。考虑载人潜器主体的舯纵剖面的二维外形,用多岛遗传算法对其粘性流场的阻力数值计算结果进行船型的一体化优化,得到二维阻力最小的优化外形。将舯纵剖面外形的优化结果应用到三维载人潜器主体,比较优化前后的主体阻力。数值计算结果表明,载人潜器主体外形优化前后阻力的优化收效在30%以上。

The control volume of a manned submersible model was discretized into multi-block structured grids.The flows around the manned submersible model were numerically simulated with Realizable κ-ε turbulence model.Tile manned submersible model tests were conducted in a towing tank,and hydrodynamic performances especially drag performance of the manned submersible model moving at different bow angles and in the cases of both ascending and descending were obtained. Numerical results were compared with experimental results,and difference between them was ac- ceptable. The 2-D shape of the center line plane of the main body of the main submersible was op- timized with muhi-island genetic algorithm for drag reduction.Optimum 2-D shape was applied to 3-D main body of the manned submersible. It indicates that difference of drag between fore-and-aft optimization of the main body of the manned submersible is more than 30% with numerical calculation.