华中科技大学学报（自然科学版）2024，Vol.52Issue(4)：8-15,8.DOI:10.13245/j.hust.240764
近水面潜航体的长径比对海表尾迹的时频域影响
Influence of submarine aspect ratio near surface on time-frequency domain of ocean surface wake
摘要
Abstract
To investigate the effect of submarine aspect ratios on sea-surface wake characteristics,the real size hull models with different aspect ratios were constructed,the computational fluid dynamics(CFD)methods were used to simulate its wave-making wake at a uniform speed in two layers of fluids,and the two-dimensional fast Fourier transform(2D-FFT)was used in the time domain to obtain the power spectral density(PSD)distribution of the wake signal.Research results show that the stratification effect is less affected when one sails near the surface,and the resulting wake spectral density value accounts for about 1%of the sea surface wake system,and whether the bow and stern transverse waves occur favorable interference or not has a greater impact on free-surface wake characteristics of both spatial domain and frequency domain than the difference in the displacement of the hull.When favorable interference occurs at both the bow and stern transverse waves,the hull with smaller aspect ratio has a relatively smaller proportion of high-frequency wave components in the sea surface wake,which provides a better wake stealth performance with a larger displacement.关键词
海表尾迹/长径比/计算流体力学/分层效应/功率谱密度Key words
sea surface wake/aspect ratio/computational fluid dynamics/stratification effect/power spectral density分类
交通工程引用本文复制引用
杨哲超,陈科,蓝林欣,尤云祥..近水面潜航体的长径比对海表尾迹的时频域影响[J].华中科技大学学报（自然科学版）,2024,52(4):8-15,8.基金项目
海南省自然科学基金资助项目(520MS071). （520MS071）
