高Re数におけるKarman-Schoenherr摩擦抵抗係数式の再考察(流体計測・実験(3),一般講演)

概要

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The total skin friction of a flat plate is directly measured with use of a towing tank. Plates are towed in still water, balancing the vertical weight by floats, and the drag force is measured by a highly efficient load cell. We have developed the new technique to correct wave-making resistance, pressure resistance and drag on a turbulence stimulator. When the measured total drag is converted into local drag, it is found that the local fictional resistance is 6 smaller than that given by the Karman-Schoenherr formula. But it is consistent with the values obtained by the floating element technique and oil film method.
2008-09-04