【摘要】 以离心压气机内部动静部件耦合的非定常流场为研究对象，本文提出了动静耦合统一正命题型式，采用κ－ε紊流模型、同步计算动静耦合流场的方法，分别对下同流量工况下离心叶轮与叶片扩压器内部非定常流动进行了数值计算。计算结果与激光多普勒测量结果进行了比较：在设计工况下，离心叶轮与叶片扩压器相互匹配较好，而在非设计工况下，流道内流动趋向恶化。说明计算结果是有一定的可信度；计算结果同时说明，只有采用非定常算法，才有可能较好地描述动静部件耦合的流场。更多还原

【Abstract】 Unsteady flow field in centrifugal fan due to the interaction between impeller and vaned diffuser is studied. The integral flow equations for the flow field with rotor/stator interaction is developted. The κ- ε turbulence model and PISO algorithm is applied to synchronously solve the integral kinetic equations with absolute and relative velocities. Compared with the experimental data by LDV at designed and off designed condition. the numerical method for unsteady flow is proved to be reliable. Moreover the numerical results illustrate unsteady scheme can investigate the flow field properly.更多还原