分层流体中水平运动潜体产生的内波分析

Internal waves generated by a horizontal moving submarine in a stritifed fluid

从线性化的Euler方程和连续方程出发,采用线性自由面条件,通过傅里叶变换法研究水平运动点源在分层流体中产生的内波.利用源汇分布法分析运动潜体产生的lee波,采用稳定相法计算远场速度.计算结果表明,高模态内波的波域角小于低模态内波的波域角,内波的波域角小于Kelvin波的波域角;随航速增大lee波主要表现为散波.

The internal wave generated by a moving point source in horizontal direction in the stratified fluid was researched by solving the linear Euler-equation and continuity equation with linear free surface condition with the method of Fourier transforms. The internal wave produced by a moving submerged body was analyzed by substituting source-sink for the body, and the velocity field was calculated by means of stationary phase. The results show that the angle of the waves district decreases with the increase of the internal wave mode and the moving velocity of the body, namely, the angle of internal wave is smaller than that of Kelvin wave, and the internal wave is largely diverging rather than transverse.