摘要
利用二阶迎风格式,在采用三种不同湍流模型分别对轴对称矢量喷管三维内流场进行对比计算后,S A一方程模型成为文中数值模拟中最有效的湍流模型,并将此模型计算的结果与模型试验结果进行了分析比较。研究结果表明,在矢量状态下,计算结果和试验结果相比,气动矢量角的相对误差不大于6%,流量系数的相对误差不大于1%,推力系数的相对误差不大于1%,所开发的计算方法可用于轴对称矢量喷管的工程设计。
After comparing the results of three different turbulence models in computing 3-D internal flow field of axisymmetric vectoring exhaust nozzles (AVEN) by means of second order upwind schemes, S-A turbulence model became the most valid turbulence model used in numerical simulation here, and its results of computation were compared with that of scale model experiments. The results indicate that in the vectoring manner the relative tolerance of resultant vector angle is less than 6% and the relative tolerance of discharge coefficient is less than 1%. In addition, the relative tolerance of thrust coefficient is less than 1%.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2003年第4期326-329,340,共5页
Journal of Propulsion Technology
关键词
湍流模型
矢量喷管
流动特性
数值仿真
Computer simulation
Fits and tolerances
Flow of fluids
Mathematical models
Three dimensional
Turbulence
Vectors
