大型船舶船底の気泡含有乱流境界層の超音波ドップラー計測(混相流動,<特集>第13回動力・エネルギー技術シンポジウム)

概要

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Friction drag accounts for 80% of the total drag for large ships, and drag reduction realized by injecting air bubbles is expected as one of the feasible ways because of less environmental impact. We have measured the turbulent boundary layer structure altered by bubbles beneath 127m-ship by means of ultrasonic Doppler velocimetry. This short paper mainly describes the measurement method of seawater velocity profiles and the some typical results on the influences of bubbles.
社団法人日本機械学会の論文
2009-03-25