Abstract
A coupling algorithm is developed to accelerate the boundary element method for both open water and unsteady calculations. It is realized in the way that the full wake alignment is conducted using the vortex lattice lifting line method with discrete wake sheet. Techniques to convert wake sheets of lifting line to those for boundary element method are described. Numerical simulations for open water and unsteady case are then carried out. It shows that the coupling method predicts similar results as the boundary element method, especially for the open water case. Evident reduction of the computational time is also observed, which is 70% and 65% for open water and unsteady calculation, respectively.
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