Abstract: In this paper, a source panel method with dissipative Green function is applied to explore the internal evolution mechanisms under the interaction between the complicated 3D flow field and double hydrofoils. Based on the dissipative source Green function, the different wave profiles of free surface are presented in the double hydrofoils flow. From the benchmark tests, we can draw a conclusion that the accuracy and robustness of the numerical algorithm can be confirmed. Numerical results show that the evolution of wave profile of single hydrofoil and double hydrofoils can be demonstrated clearly. The parallel wave ripple will interact with the other waves and the crest and trough can be overlapped. The double hydrofoils systems can present different wave ripple profiles obviously corresponding with the different staggered position.

Key words: potential flow, dissipative Green function, singular wave integral, second Green's formula