Smart control of gas-liquid two-phase turbulent boundary layer

2016 Fiscal Year Final Research Report

• Project/Area Number: 24246033
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Hokkaido University
• Principal Investigator: Murai Yuichi 北海道大学, 工学研究院, 教授 (80273001)
• Co-Investigator(Kenkyū-buntansha): 石川 正明 琉球大学, 工学部, 助教 (00398306) ; 田坂 裕司 北海道大学, 工学(系)研究科(研究院), 准教授 (00419946) ; 熊谷 一郎 明星大学, 理工学部, 准教授 (50597680) ; 北川 石英 京都工芸繊維大学, 機械工学系, 准教授 (80379065) ; 大石 義彦 室蘭工業大学, 工学(系)研究科(研究院), 助教 (90617078)
• Project Period (FY): 2012-04-01 – 2017-03-31
• Keywords: 流体工学 / 抵抗低減 / 船舶 / 混相流 / 気泡 / 乱流 / 境界層 / 翼

Outline of Final Research Achievements

After great dissaster of east Japan 2011, our human kind is tasked to realize high energy safety and production in improved efficiency upon needs of sustainable society. Marine technoligy is one of such concerns, to which we develop turbulent frictional drag reduction method feasible to marine vessels. In this project, we have established three kinds of new techniques that convert unstable bubbly two-phase flow to controled state to save energy consumption of large ships through multiple laboratory scaled fundamental experiments to find out hidden science in bubbly turbulent boundary layer at high Reynolds numbers. We have eventually suceeded in 15% energy saving for four kinds of marine vessels demonsrated by sea-trial as well.

Free Research Field

流体工学