Numerical Prediction of Wave Breaking Noise for KCS Ship Model in Still Water Navigation
Underwater noise is related to ship stealth as well as comfort,but the breaking wave phenomenon is particularly difficult to predict due to its complex two-phase flow characteristics.In this paper,we adopt the Deane-Czerski empirical formula and improve the calculation of some parameters in the formula to conduct a noise prediction study on the distribution of common wave-breaking bubbles.The results show that the prediction results are more consistent with the experimental results and provide a feasible program for future underwater noise prediction.Next,the benchmark KCS ship model is used to study the bow-breaking wave flow with Froud number 0.35 selected,and OpenFOAM,an open-source CFD platform,is used to simulate the flow field with the delayed detached eddy simulation method.The contribution of dipole and quadrupole to the sound pressure in the FW-H acoustic equation is analyzed.The results show that the quadrupole sound pressure dominates in the low-frequency range,the dipole sound pressure dominates in the middle-frequency range,and the bubble noise dominates in the high-frequency range.
KCS ship modelbreaking bow wavesbreaking wave noiseDeane-Czerski model
NETL
NSTL
万方数据
