The comprehensive understanding of the flow mechanism in vaned diffuser is crucial for designing a high quality vaned diffuser.This thesis tries to carry out a deeper investigation in this field.

• 了解其内部流动机理对合理设计和优化叶片扩压器有着重要的指导意义，而目前对叶片扩压器内的流动情况作透彻分析的工作开展得还很少，本文试图在这一方面作出更深入的研究。