摘要
通过求解二维雷诺平均Navier Stokes方程 ,数值模拟了不同进口湍流度下的涡轮级中的非定常流场及温度场。结果表明 ,增大湍流度对叶栅通道内时均压力分布影响很小 ,但是对涡轮级中的温度分布会产生很大影响。当涡轮进口有热斑存在时 ,增大湍流度将会使热斑中的热流体温度扩散更快 ,从而叶栅通道中的温度场分布趋向均匀 ,同时动叶压力面侧与吸力面侧的时均温度差别减小 。
A two-dimensional Navier-Stokes equation was solved to predict unsteady flow and temperature fields with different turbulence intensity in a turbine stage. It is found that turbulence intensity has significant effects on the temperature distribution but the pressure distribution does not. When hot streak was introduced in the turbine's inlet, high turbulence intensity would make the temperature of hot gas diffuse more quickly, and the temperature distribution tend to be more uniform. The temperature discrepancy between suction surface and pressure surface of rotor would be decreased, and the temperature profile along the chord become more even.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2002年第1期40-44,共5页
Journal of Propulsion Technology
关键词
涡轮叶栅
非定常流
热斑
湍流度
数值仿真
航空发动机
Computer simulation
Navier Stokes equations
Temperature
Turbulence
Two dimensional
Unsteady flow
