摘要
为探究多排气孔的气层减阻技术对空气层特性及减阻性能的影响,本文采用计算流体力学软件对某超大型油船的缩尺模型进行气层减阻挖孔处理,基于RANS方法,采用SST k-ω模型、VOF模型对该模型不同工况下的运动进行数值模拟。研究了喷气速率、航速和吃水对该模型的静水阻力、气层厚度、气层形态的影响规律,得出减阻率与气层覆盖面积和吃水深度有直接关系的结论;模型在设计吃水和结构吃水获得了35%~50%的减阻率,压载航行获得了11%~32%的减阻率。数值结果表明:该气层减阻模型在设计吃水时低速航行应选择低速喷气,中高速航行应选择高速喷气;结构吃水时应保持低速喷气;压载吃水时低速航行可不喷气,中高速航行应低速喷气,即可达到较佳的减阻率。
To explore the influence of multivent air-layer drag reduction technology on air-layer characteristics and drag reduction performance,computational fluid dynamics software was used for the air-layer drag reduction hole treatment on a scale model of a very large crude carrier.Based on the RANS method,the SST k-w model and VOF model were used to compare the drag reduction effect and air-layer characteristics of the model under different work-ing conditions.The effects of the jet rate,speed,and draft on the hydrostatic resistance,thickness,and form of the air layer were studied,concluding that the drag resistance rate was directly related to the cover area of the air layer and the depth of the draft.The drag resistance rate of the model was 35%~50%in the design draft and struc-ture draft and 11%~32%in ballast sailing.Numerical results showed that the air-layer drag reduction model could achieve a better drag reduction rate by choosing a low-speed jet for low-speed navigation and a high-speed jet for medium-to high-speed navigation in the design draft and keeping a low-speed jet in the structural draft,no jet for low-speed navigation,and a low-speed jet for medium-to high-speed navigation in the ballast draft.
作者
陈伟民
苏玉民
赵大刚
高适
钟祥海
CHEN Weimin;SU Yumin;ZHAO Dagang;GAO Shi;ZHONG Xianghai(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;Shanghai Ship and Shipping Re-search Institute Co.,Ltd.,Shanghai 200135,China;Qingdao Innovation Development Base,Harbin Engineering University,Qingdao 266000,China)
出处
《哈尔滨工程大学学报》
北大核心
2025年第6期1082-1089,共8页
Journal of Harbin Engineering University
基金
工业和信息化部高技术船舶科研项目(CBN1N20-05)。
关键词
气层减阻
超大型油船
静水阻力
减阻率
气层厚度
气层覆盖面积
协同喷气方案
air-layer drag resistance
very large crude carrier
calm water resistance
drag resistance rate
air-layer thickness
air-layer cover area
coordinated air injection scheme
