摘要
用数值计算的方法 ,研究了宽高比分别为 1 ,4,8,1 2和 1 6的矩形喷管射流与外流的掺混特性 ,并与等面积的轴对称喷管进行了比较。研究表明 ,矩形喷管与轴对称喷管相比 ,射流核心区长度较短 ,射流中心线上速度和温度衰减较快 ,掺混明显强于轴对称喷管 ,并且随着宽高比的增加 。
The mixing characteristics of external flow with jets from five rectangular nozzles with aspect ratio of 1, 4, 8, 12, 16 and from an axisymmetric nozzle were studied numerically. All nozzles studied had equal exit area. The results show that the rectangular nozzles lead to a relatively shorter jet core region and faster velocity and temperature decay rate than the axisymmetric one on centerline. This trend increases with the increase of aspect ratio.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2005年第1期104-110,共7页
Journal of Aerospace Power
关键词
航空、航天推进系统
矩形喷管
轴对称喷管
宽高比
掺混
Aircraft propulsion
Aspect ratio
Boundary conditions
Mixing
Numerical methods
Turbulent flow
Velocity measurement
