長尺平板船を用いたマイクロバブルの尺度影響に関する研究

概要

論文の詳細を見る
Using flat plate ships of up to 50m in length in a 400m-long towing tank, we carried out experiments on the scale effect of microbubbles, the aim being to apply microbubbles to full-scale ships. The scale effect wa studied to determine how a model ship's size affects microbubbles' ability to reduce skin friction. By understanding the scale effect we can determine the performance of microbubbles in reducing skin friction in full-scale ships. The experiments showed that in the area covered with microbubbles, frictional drag wa reduced by as much as 22%, and measurements using friction sensors indicated that even at the downstream end of the 50m-long ship the friction wa reduced by about 2%. We also measured the local void ratio distribution using a suction tube method, and found that there was a strong correlation between the skin friction reduction and the local void ratio near the ship's bottom wall. These confirm the possibility of using microbubbles in full-scale ships. We verified the reliability of the measured data by comparing it with data obtained in separate towing tanks and by checking the data itself.
社団法人日本船舶海洋工学会の論文
2003-03-25