二维近似船底模型微气泡减阻数值模拟  

The Numerical Simulation of the Micro-bubbles Drag Reduction in the Bottom of Two-dimensional Approximate Ship Model

作　　者：曹慧哲[1] 蔡伟华[2] 朱蒙生[1] 高杰强[1] 李彪[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《节能技术》2010年第6期483-488,共6页Energy Conservation Technology

基　　金：国家自然科学基金(50908064)

摘　　要：在船舶节能方式中,微气泡减阻越来越受到人们的青睐,船舶微气泡减阻的研究是一项非常复杂的课题,影响船舶微气泡减阻的因素也很多。本文试图从二维近似船底模型入手,模拟分析空隙率、主流速度、喷气速度、气泡直径和喷入角度对减阻率的影响。结果表明空隙率是影响减阻率的重要因素,喷入微气泡能够达到减阻效果,最大减幅可达85%左右。The micro-bubble drag reduction is drawing more and more attention among marine energy-saving technologies,however the research into ship drag reduction by micro-bubble is a very complex subject,as many factors are influencing.This paper started with two-dimensional approximate model of the bottom.by analyzing the relationship between drag reduction rate and void fraction,the latter known as an important factor which affects reduction rate.and,carries out the numerical simulation for micro-bubble drag reduction law of the two-dimensional flat.And it analyzes the affecting of void fraction,the main stream velocity,jet velocity,bubble diameter and injecting angle to drag reduction rate.The result shows that by injecting the microbubbles,drag reduction effect can be achieved,and the maximum reduction is up to 85%.

关 键 词：微气泡减阻 船底模型 空隙率 

分 类 号：U661.73[交通运输工程—船舶及航道工程]