Cooperative Resistance Tests with Geosim Models of a High-Speed Semi-Displacement Craft

概要

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A resistance test program of a high-speed semi-displacement craft was performed by sixteen towing tanks (including one circulating water channel) in Japan and it involved thirteen geosim models of 0.4 to 4 meters in length. This work forms a part of the tasks of the High-Speed Marine Vehicle Committee of the 19th ITTC. Analyzing sixty three data sets, the following conclusions are obtained. T〓scale effect is not found in the wave resistance, and on the other hand, it appears in trim and spray 〓ation. The form factor of frictional resistance can be determined even at high Froude numbers, by 〓e method suggested by Hughes as a function of Froude number. The application of turbulence stimulator is necessary in resistance tests even for larger models at high-speed. Appropriate turbulence stimulator for semi-displacement hull forms should be developed. The characteristics of semi-displacement hull forms in the range of medium 〓roude numbers (Fn<1.3) are similar to those of displacement hull forms in many points. This means that the ITTC 1978 power prediction method, with partial modifications, would be applicable to this type of high-speed craft.
社団法人日本船舶海洋工学会の論文