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水下航行体行进阻力与自由水面兴波的实验与数值研究 |
Experimental and numerical study on travel resistance and waves of free surface of underwater vehicle |
投稿时间:2020-04-04 修订日期:2020-06-04 |
DOI: |
中文关键词: 阻力,自由水面兴波,潜艇,物理模型实验,数值模拟 |
英文关键词: Resistance, Waves of free surface, Submarine, Physical model experiment, Numerical simulation |
基金项目:军委装备部预研领域基金(61402070201);中央高校基本科研业务费(DUT18LK09) |
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中文摘要: |
本文采用物理模型实验与计算流体力学方法,对潜艇不同潜深和弗劳德数条件下的阻力与自由水面兴波进行了研究,并通过多项式拟合对不同潜深条件下阻力随弗劳德数的变化关系进行了分析。研究结果表明,当潜深较大时,潜艇阻力与弗劳德数呈现二次幂的关系,且拟合相关度较高。当潜深较小时,二次多项式拟合相关度降低。阻力随潜深的变化基本呈现先增大而后减小,弗劳德数较高时变化较为剧烈,弗劳德数较低时变化较为缓慢,且当潜深较深时阻力不随水深变化而改变。数值结果表明,弗劳德数的增加与潜深的减小均将导致自由水面波长和波幅的增大,兴波能量增加,潜艇克服阻力做的功增加,从而导致潜艇的阻力增大。 |
英文摘要: |
The physical model experiments and computational fluid dynamics methods are used to research on the resistance and free surface wave of submarine under different depth and Froude number conditions in this study. In addition, the relationship between resistance and Froude number under different dive depth conditions is analyzed by polynomial fitting. The results show that the submarine resistance and Froude number are in a relationship of second power when the dive depth becomes larger, with fitting correlation is higher. When the dive depth gets smaller, the correlation of quadratic polynomial fitting gets reduced. The changes of resistance with dive depth basically increase first and then decrease. When the Froude number gets higher, the resistance changes drastically. In contrast, the resistance changes slowly with low Froude number. Furthermore, when the dive depth is deep enough, resistance does not change with the change of water depth. The numerical results show that both the increase of Froude number and the decrease of dive depth will lead to the increase of wavelength and amplitude of the free surface, which means the energy of wave getting increased. This leads to the increase of the work of submarine to overcome resistance, resulting in the increase of resistance of submarine. |
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