首页 | 本学科首页   官方微博 | 高级检索  
     检索      

带有双层壁扩压器的波瓣喷管混合流场的数值计算
引用本文:王锁芳,李立国.带有双层壁扩压器的波瓣喷管混合流场的数值计算[J].航空学报,2001,22(6):533-535.
作者姓名:王锁芳  李立国
作者单位:南京航空航天大学能源工程系
摘    要: 采用三维贴体曲线坐标网格,边界网格加密且正交,在整个计算区域进行全场计算。为避免因波瓣造成的网格强烈的非正交引起解的发散,采用了Chen和Kim修正的k-ε湍流模型及同位网格SIMPLC计算方法,对带有双层壁扩压器的波瓣喷管混合流动进行了数值计算和分析。对波瓣及双层壁,采用大粘性的方法解决流固耦合。计算结果表明:在双层壁间有外界冷气流被引射进入,形成了壁面的冷却气流;自波瓣出口截面沿流向产生的环流速度场,强化了主次流的掺混,速度分布渐趋均匀。计算结果与实验数据符合良好,二者在离开波瓣52 mm的混合管内相对主流速度的最大误差为21.65 %。

关 键 词:计算流体力学  波瓣  双层壁  引射  湍流  红外辐射  
文章编号:1000-6893(2001)06-0533-03
修稿时间:2000年9月22日

NUMERICAL COMPUTATION OF MIXING FLOW OF A LOBED EJECTOR WITH A DOUBLE-WALL DIFFUSER
WANG Suo fang,LI Li guo.NUMERICAL COMPUTATION OF MIXING FLOW OF A LOBED EJECTOR WITH A DOUBLE-WALL DIFFUSER[J].Acta Aeronautica et Astronautica Sinica,2001,22(6):533-535.
Authors:WANG Suo fang  LI Li guo
Institution:Department of Energy Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Abstract:The three dimensional body fitted grid is used. The grids near the boundaries are dense and orthogonal. The whole field of the domain is calculated. In order to avoid the divergence as the non orthogonality of the lobe, the Chen Kim modified k ε  model of turbulence and the co located grid, SIMPLEC, are used in the numerical analysis of the mixing flow of the lobed ejector with a double wall diffuser by using the great viscosity for the lobe. The results show that the air is ejected into the double wall section to form the cooling flow, the annular like flow generated along from the lobe enhances the mixing of the primary and secondary flows and the velocity is well distributed. The maximum error between the numerical and the experimental data under the condition relative to the primary speed is about 21.65% at the position of 52mm from the lobe in the mixing section.
Keywords:computational fluid mechanics  lobed  mixing  double  wall diffuser  ejector  turbulence  infrared radiation
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《航空学报》浏览原始摘要信息
点击此处可从《航空学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号