表面活性剂减阻溶液湍流流动研究进展  

PROGRESS IN THE STUDY ON TURBULENT FLOWS OF DRAG REDUCING SURFACTANT SOLUTIONS

作　　者：庞明军[1] 魏进家[1] 

机构地区：[1]西安交通大学,动力工程多相流国家重点实验室,西安710049

出　　处：《力学进展》2010年第2期129-146,共18页Advances in Mechanics

基　　金：国家自然科学基金(10602043,50536020);江苏省自然科学基金(BK2009145);高等学校博士学科点专项科研基金(20090201110002)资助项目~~

摘　　要：与聚合物添加剂相比,表面活性剂具有寿命长,不受机械力和高温影响发生降解的特点,目前被认为是最具有适用价值的减阻添加剂.针对表面活性剂湍流减阻机理,尽管已经开展了大量的实验研究、理论分析和数值模拟,但仍处于探索阶段,尚未定论.文中对目前国内外有关表面活性剂减阻溶液湍流流动的研究如平均速度、湍流强度、雷诺应力和相关系数等湍流统计量以及取得的成果进行了归纳和总结.目前普遍认为阻力减小是由流动垂直方向的湍流强度受抑和脉动速度分量解耦导致雷诺应力极大降低引起的.分析了目前研究存在的问题,对今后继续开展研究提出了自己的观点.As compared with polymers,surfactant is at present the most promising drag-reducing additive because of its long service life and the advantage of freeing of mechanical and heat degradation.Although a large amount of experimental studies,theoretical analyses and numerical simulations were performed on surfactants turbulent drag-reduction,no convincing conclusion has been drawn yet.This paper summarizes major characteristics of turbulent flows such as the mean velocity profile,velocity fluctuation intensity profile, correlation coefficient and turbulent stress profile.It is generally believed that the inhibition of wall-normal turbulence intensity and the decrease of Reynolds stress due to the de-correlation between the two fluctuation velocity components lead to the drag reduction in surfactant drag-reducing flows.The problems existing in the current researches are analyzed,and some suggestions are put forward for further studies.

关 键 词：表面活性剂 减阻流动 湍流统计量 湍流结构 

分 类 号：O357.5[理学—流体力学]