摘要
针对上下壁面交错又排布置肋通道的阻力特性，利用数值计算的方法研究通道的压力系数分布。入口雷诺数变化范围为60000-150000；采用非结构化网格进行网格划分，利用realizable湍流模型和增强壁面函数封闭方程；计算结果表明，带肋通道的流动阻力较大，沿着流动方向，压力系数迅速地减小，随着雷诺数的增加，压力系数增加，带肋的下壁面压力系数分布非常的不均匀，不带肋的左侧壁面压力系数分布相对均匀。
In accordance with resistance- force characteristics of rectangular passage rib arranged crossly on the opposite walls, the essay executed research on passage＇ s pressure parameter distribution via numerical computation. The inlet Reynolds number＇s variation ranges turned out 60000-150000 by adopting structured grid to execute division and utilizing realizable turbulence model to enhance wall surface＇s functional equation. The computation outcome revealed that passage with ribs＇ motion resistance represented the situation as pressure parameter decreasing rapidly along the flowing direction. With the increasing of Reynolds, pressure parameters added simultaneously, the lower wall of passage with rib＇s pressure parameter demonstrated imbalanced distribution yet left walls without ribs＇ parameter presented balanced variation.
关键词
航空发动机
内冷通道
肋
流阻
数值仿真
Aero- engine
Internal Cooling Passage
Ribs
Flowing Resistance
Numerical Simulation
