高速水下航行体尾部流场特性分析

Analysis on Trailing Flow Performance of High-speed Underwater Vehicle

为研究航行体尾部流场特性,利用Rayleigh方程,建立了水下高速航行体尾部气团发展过程模型,分析了尾部气团半径与压力之间的变化关系,通过建立尾部气团方程与航行体运动方程的耦合求解,讨论了尾部气团变化对航行体运动参数的影响。结果表明,数值模拟计算结果与试验测量结果吻合较好。不同的工况条件下,航行体尾部压力均呈现明显的周期性振荡现象。随着初始压力的提高,尾部压力脉动周期逐渐变长,振荡幅值逐渐变小。初始余压越高,其初始运动的加速度越大,但具有加速度衰减的显著特征。

In order to study trailing flow performance of underwater vehicle,the model of the underwater vehicle tail gas bubble developing process is established by using Rayleigh equation. The interrelationship of tail gas bubble radius and pressure of is analyzed. The interaction equation between tail gas bubble change and vehicle motion parameters is studied by coupling equation of gas bubble and vehicle motion. The result shows that the simulation results agree with experimental results well,and that the change of environment pressure occurs under different work situations. The bigger initial pressure is,the longer oscillation period of vehicle tail pressure is. The bigger initial pressure is,the bigger initial acceleration is,but the acceleration is distinctly attenuated with time.