水下航行器头部流噪声数值仿真与实验

选取头部线型,对航行器头部基于RNG k-ε湍流模型及FW-H声学模型进行流噪声模拟,然后对3种头部线型的航行器在不同速度下分别进行水洞实验。通过对比分析数值仿真与实验结果发现,航行器头部流噪声随着频率的增大而逐渐减小,随着速度的增大而增大。在相同速度下,与头部线型2、头部线型3相比,头部线型1流噪声较小,具有更好的降噪作用。所采用的计算方法可以比较准确地模拟航行器头部流噪声情况。

Numerical Simulation and Experiment Research on Underwater Vehicle Head Flow Noise

Three head lines are selected to research the underwater vehicle flow noise based on RNG turbulence model and FW-H acoustic model.Then water tunnel experiments of three head lines of underwater vehicles are taken under different velocities.Several conclusions are drawn through the comparison and analysis of the numerical simulation and experimental results.The vehicle head flow noise decreases with the increasing of frequency and increases with the increasing of velocity.At the same velocity,the first head linear vehicle can decrease the noise better than those two lines.The simulation method could simulate the vehicle head flow noise accurately.