对旋式轴流风机非设计点流场的分析

Research of Flowfields at Non-design Points of Counter Rotating Axial Flow Fans

从三维雷诺时平均非定常的 NAVIER- STOKES方程出发 ,采用压力耦合方程的半隐式方法 (SIMPLE) ,对流项采用迎风差分格式 (UD) ,结合各向异性 K-ε湍流模型 ,数值模拟了对旋式轴流风机非设计点的流场 ,并与已有的结果进行了比较。结果表明 ,求解 NAVIER- STOKES方程是定性分析对旋式轴流风机非设计点性能的一种有效方法。

The viscous flowfield of the counter rotating axial flow fans at non design points are simulated based on three dimensional REYNOLDS average unsteady NAVIER STOKES equations,with semi implicit method for pressure linked equations (SIMPLE),convection adopted Up wind (UD) scheme,K ε turbulent model is used during simulation.The calculating results show that SIMPLE is effective to NAVIER STOKES equations in analyzing the non design performance of counter rotating axial flow fans.