Abstract
We have conducted the velocity measurements for turbulent water flow over an angled wavy plate on the bottom wall in an open channel. The plate is a model of deformed skin of a swiftly swimming dolphin. The friction drag acting on the plate is estimated from the mean velocity profile. The total drag acting on the plate has also been measured from the strain of thin-metal supports of the plate. The experimental results show 4% reduction of friction drag and 58% increase in the total drag for the wavy plate compared with those in the case of flat wall.
