两层流中潜体运动与诱发内波特征关系研究

摘要

The motion of submerged body in stratified fluids will excite the generation of internal waves. In this paper, by control the motion of submerged body using user defined files, using layering to ensure the boundary layer will not be influenced by the motion of submerged body. The waveform of interface was cap-tured by means of solving the volume fraction of each fluids based on multiphase flow model of RANS e-quation. The calculation results of uniform motion were in good agreement with experimental results. Com-paring the the characteristics of variation in internal wave heights and lengths with densimetric Froude num-ber at different depth the critical densimetric Froude number induced the maximum internal wave heights was obtained by this method. The interaction of submerged body acceleration and deceleration motion with induced internal wave at critical densimetric Froude number was mainly studied.%在两层流体中潜体运动会激发生成内波。文章通过编程控制潜体运动，使用动态分层法保证潜体运动时边界层不受影响，基于RANS方程多相流模型，采用求解相的体积分数方式捕捉内界面波形。潜体定常运动计算结果与实验结果相符，通过此方法，对比不同潜深下潜体诱发内波波高和波长随密度Froude数的变化特征，得到了诱发内波波高最大处的临界密度Froude数，重点研究了在临界密度Froude数处潜体加速运动和减速运动对诱发内波幅值及其波动过程的影响。