华中科技大学学报（自然科学版）2025，Vol.53Issue(4)：45-51,7.DOI:10.13245/j.hust.250146
限制水域航道宽度对气层减阻影响规律数值研究
Numerical study on influence of channel width on air layer drag reduction in restricted waterways
摘要
Abstract
To promote the application of air layer drag reduction technology in inland waterway transportation vessels and to explore the impact of narrow channels during low water periods on air layer drag reduction effects,numerical simulations of air layer drag reduction were conducted under various channel widths.This study was based on the verification of numerical calculation accuracy through model experiments and focuses on a river-sea direct ship which had a groove on the bottom with air injection.The influence of channel width variations on the air layer morphology and drag reduction effects around the ship was analyzed.Research results show that as the channel width decreases,the wavelength of air layer fluctuations under the ship increases.Due to the blockage effects and interference from pool wall echoes,local fragmentation of the air layer may occur when the channel width is narrow.When the ratio of the channel width to the ship's width is 4,the channel width has impacted the air drag reduction effect,resulting in a significant decrease in drag reduction rate.However,as the channel width further decreases,the drag reduction effect gradually improves,and the relative and absolute drag reduction rates generally increase with the decrease of channel width.Changes in the channel width have little effect on the reduction rate of frictional resistance.The decrease in the reduction effect of viscous pressure resistance,caused by the changes in flow velocity and pressure distribution around the hull is the fundamental reason for the decrease in the total resistance reduction effect.关键词
气层减阻/航道宽度/气层状态/减阻率/肥大型船Key words
air layer drag reduction/channel width/air layer morphology/drag reduction rate/full-formed ship分类
交通运输引用本文复制引用
叶青,姚朝帮,欧勇鹏,向国..限制水域航道宽度对气层减阻影响规律数值研究[J].华中科技大学学报（自然科学版）,2025,53(4):45-51,7.基金项目
国家自然科学基金资助项目(52101368). （52101368）
