基于边界元理论求解水下潜艇流噪声的研究

Research on the flow noise of underwater submarine based on boundary element method

该文运用无紧致声源假定的边界元法和传统的FW-H方程对水滴型潜艇的流噪声特性进行了数值模拟,将数值模拟得到的水听器处的声压值与试验值进行了对比,并研究了两种方法在求解沿潜艇X轴和Z轴上不同特征点处流噪声时的差异。结果表明,对于水听器处的流噪声声压值,边界元法得到的解更接近于试验值,而对于远场求解,两种方法得到的结果相差不大。

By using boundary element method and traditional method of FW-H equation, numerical simulation on the flow noise of streamlined submarine is done in this research. Numerical simulation results of sound pressure at a point where hydrophone located are compared with experimental data. Further research is done on the flow noise at a series of feature points along X and Z direction by using the above two methods. It can be concluded from this numerical simulation that for the flow noise at the hydrophone located point given in this paper, numerical results from boundary element method are closer to experimental data. Besides, for the sound pressure in far field, numerical simulation results from the two above methods are almost the same.