矩形射流流动和燃烧中拟序结构的实验研究  

EXPERIMENTAL STUDIES ON COHERENT STRUCTURES OF RECTANGULAR JET FLOW AND COMBUSTION

作　　者：蒋平[1] 林川[1] 郭印诚[1] 张会强[1] 王希麟[1] 林文漪[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《工程热物理学报》2004年第4期703-706,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50006006)

摘　　要：对2:1的矩形喷口射流流动和燃烧过程进行了系列实验,展示了拟序结构的演化过程以及射流近场间歇产生的 圆环内接矩形和触角形结构,这些结构的形成与大涡的演变存在密切相关;流动和燃烧的实验结果都表明副平面内的射流 扩展角度大于主平面。副平面内大涡的运动会拉伸或压缩火焰锋面,并在局部区域形成火焰面的“孤岛”结构。Series experiments of a rectangular jet with aspect ratio of 2:1 were carried out. The visualization results demonstrate the evolution of coherent structures, and the unique annulus-rectangle joint structure and the antenna alike configuration are also found in the near field of jet flow. The Jet expands more rapidly in the minor plane than in the major plane, which occurs both in cool flow and combustion process. The large-scale structures in the minor plane stretch or compress the flame surface, and lead to the formation of separated flame surface islands.

关 键 词：矩形射流 拟序结构 流动显示 燃烧 

分 类 号：O357[理学—流体力学]