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角区分离是一种常发生于轴流压气机“吸力面-端壁”角区的三维分离现象,该现象以及随之产生的流场堵塞和流场损失会对压气机的稳定工作和效率造成不良影响,严重时会发展为“角区失速”。随着现代轴流压气机单级负荷的提升,角区分离所产生的负面影响日益突出,严重阻碍了高负荷压气机的发展,各种主动、被动流动控制方法也因此被广泛应用于角区分离的流动控制。首先,从角区分离对轴流压气机性能的影响、角区分离的流场特征和角区失速的判别准则3个方面对轴流压气机角区分离的流动机理研究进行了回顾,详细讨论了角区分离的影响因素、角区分离的流动拓扑分析以及角区失速的定义与判别方法。其次,对三维叶片设计、翼刀与凹槽、旋涡发生器、非轴对称端壁造型、射流式旋涡发生器、等离子体气动激励以及附面层抽吸与附面层射流7类流动控制方法的研究进展进行了回顾,重点探讨了这些流动控制方法在抑制角区分离方面的应用,并给出了这些流动控制方法的对角区分离的作用机制。最后,对角区分离领域的研究现状进行了简要地总结,指出了现有角区分离的机理研究和流动控制研究所存在的不足,并对该领域未来的发展进行了展望。
Corner separation is a three-dimensional phenomenon often occurs in the axial compressor “suction side - end wall ” corner area, the phenomenon and the consequent flow blockage and loss of flow field will affect the stable operation of the compressor And efficiency adversely affect the development of serious “ corner stall ”. With the increase of single-stage load of modern axial-flow compressor, the negative influence of corner separation becomes more and more serious, which seriously hinders the development of high-load compressor. Various active and passive flow control methods are widely used in corner area Isolated flow control. Firstly, the flow mechanism of the separation of the axial compressor from the angle is discussed in detail from three aspects: the influence of the separation of corner on the performance of the axial compressor, the flow field characteristic of the separation of the angular zone and the criterion of the stall of the angular zone The influencing factors of the separation of the corner zone, the flow topological analysis of the separation of the corner zone and the definition and discrimination of the stall in the corner zone. Secondly, seven kinds of flow control methods for three-dimensional blade design, wing knife and groove, vortex generator, non-axisymmetric end wall modeling, jet vortex generator, plasma aerodynamic excitation, The research progress of these flow control methods is reviewed. The application of these flow control methods in suppressing the separation of corner regions is mainly discussed. The mechanism of the diagonal region separation of these flow control methods is also given. Finally, the status quo of the research on diagonal zone separation is briefly summarized. The existing research on mechanism separation and flow control of corner zone separation is pointed out, and the future development in this field is prospected.