抄録
In the several succeeding reports, a boundary layer computation based upon integral method is tried to simulate the viscous flow of Wigley hulls. Through the comparison between measured and evaluated, the boundary layer characteristics, forces and moments exerted on hulls are studied by which the availability of the computation model applied in the present analysis is discussed. The first report is served for a mathematical expression of the outer inviscid flow by double model approximation. Polynomial centerplane sources are used. Both symmetric and non-symmetric sources equivalent to the Wigley model are obtained and approximate hull surface potential streamlines and equipotential lines are traced to provide triply orthogonal curvilinear coordinates on the hull for the boundary layer computation. Results contained in the 1st report are: (1) Moderate number of polynomial source terms yet generates globally reasonable velocity field. (2) Composite source systems where the equivalent sources for upper part and lower part of the hull are separately analyzed and the flow is expressed by their superposition are effective to provide curvilinear coordinates.
