哈尔滨工程大学学报Issue(3)：361-367,7.DOI:10.3969/j.issn.1006-7043.201301044
旋成体环形射流表面优化设计与减阻机理分析
Optimal design of bodies of revolution of annular jet flow surface and analysis of the drag reduction mechanism
摘要
Abstract
With a focus on the problem of bionic jet drag reduction , a bionic jet surface model is presented by using the jet flow of shark cheeks as the prototype .Based on the orthogonal test design method , this paper goes into detail about numerical simulations by making a comparison between bodies of revolution of a bionic annular jet flow sur -face ( BRBAJFS ) and smooth bodies of revolution with the SST k-ωturbulence model .The results prove that BRBAJFS has obvious drag-reduction and energy-saving effects .The highest energy saving efficiency can be 262 and the corresponding rate of drag reduction is 27.74%.The jet velocity has the most important impact on energy saving efficiency and it has a linear relation with the energy saving efficiency , i.e., the energy saving efficiency will decrease with an increase in the jet velocity .Furthermore, the position of the jet hole has the greatest impact on the total resistance .When the jet hole is far away from the bottom of the bodies of revolution , the drag reduction effi-ciency will increase and BRBAJFS decreases the viscous friction resistance by decreasing the velocity gradient of the wall and increasing the area of counterblows .There can also be a decrease in the pressure drag resulting from the jet fluid complementing the bottom of the bodies of revolution fluid .关键词
射流/射流减阻/数值模拟/正交试验/旋成体/减阻机理Key words
jet flow/jet drag reduction/numerical simulation/orthogonal test/body of revolution/drag reduction mechanism分类
通用工业技术引用本文复制引用
赵刚,李芳,臧东阳..旋成体环形射流表面优化设计与减阻机理分析[J].哈尔滨工程大学学报,2014,(3):361-367,7.基金项目
国家自然科学基金资助项目（51275102）． （）
