船舶空气润滑减阻技术影响因素分析

Analysis of influencing factors of ship air lubrication drag reduction technology

为了应对全球变暖的环境和油价上涨,航运业对节能船舶的发展寄予厚望。空气润滑能够减少船舶摩擦阻力和提高燃油效率,是一项非常具有发展前景的技术。本文主要介绍空气润滑减阻技术原理与分类,从喷气流量,气孔数量和位置以及船速3个方面,分析对空气润滑减阻效果产生的影响。得出以下结论:当船速恒定时,减阻率会随着喷气流量增加而升高;在船底或船侧布置气口时,气孔数量增加会提高减阻率,气孔应该布置在船底靠前位置,约为船长1/3;喷气流量应与船速相匹配,可以最大实现净节能,节省约输出功率的10%。

In response to global warming and oil prices,the shipping industry has high hopes for the development of energy-efficient ships.Air lubrication can reduce the frictional resistance of ships and improve fuel efficiency,and is a very promising technology.This paper mainly introduces the principle and classification of air lubricated drag reduction technology,and analyzes the impact on the air lubricated drag reduction effect from three aspects:jet flow rate,number and position of air holes,and ship speed.The following conclusions are drawn:the drag reduction rate will increase with the increase of the jet flow rate;the air holes should be arranged in the forward position of the bottom of the ship,which is about 1/3 of the length of the ship,the jet flow rate should match the ship speed,which can maximize the net energy saving and can save about 10%of output power.