微吹吸减阻的模型化数值模拟研究  

Modeling-Methodology Numerical Simulation of Micro Blowing-Suction Technique

作　　者：陈欣荣 张劲柏[2] 兰世隆[2] CHEN Xinronga;ZHANG Jinbaib;LAN Shilongb(a.Sino-French Engineer Schoo;b.School of Aeronautic Science and Engineer,Beihang University,Beijing 100091,Chin)

机构地区：[1]北京航空航天大学中法工程师学院,北京100091 [2]北京航空航天大学航空科学与工程学院,北京100091

出　　处：《重庆理工大学学报（自然科学）》2018年第7期60-66,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：中欧航空科技合作DRAGY项目;工信部资助民用飞机专项科研项目

摘　　要：微吹技术是一种新型摩擦减阻技术,利用微量气体喷射干扰边界层底部流动,达到减少壁面摩擦阻力效果。微吹减阻已经通过实验证明具有较高可行性,微吹技术能在亚音速和超音速环境中完成超过50%的摩擦减阻任务。基于此,使用模型化方法对三维槽道湍流微吹过程进行直接数值模拟,建立不同吹气构型,分析微吹控制机理。研究结果表明:在吹气控制条件下,通过外界能量对近壁区流动结构的控制能降低摩擦阻力,吹气量越大则控制效果越强,增大吹气量或者孔隙率能增强减阻效果。Micro-blowing Technique is a new technology for reducing turbulent skin friction. It fulfills the friction reduction task by interfering the boundary layer flow with micro-mass air jet. Results from proof-of-concept experiments show that this technology could potentially reduce turbulent skin friction by more than 50% of the skin friction of a solid flat plate for subsonic and supersonic flow. The primary purpose of this paper is to study on the mechanism of this new technology through the modeling-methodology direct numerical simulation. A series of different blowing-suction configurations will be established to find out the mechanism of friction reduction induced by micro blowing. Under the influence of micro blowing,increment of blowing flow rate and porosity of micro holes can reduce significantly more skin friction.

关 键 词：微吹 摩擦减阻 直接数值模拟 

分 类 号：O357.5[理学—流体力学]