轴流压气机角区分离的研究进展

doi:10.7527/S1000-6893.2017.620974

Abstract

Abstract:

Corner separation is a kind of three-dimensional separation that occurs commonly in the suction-endwall corner area of axial compressors. Corner separation and the associated flow losses and blockages will have negative effect on stability and efficiency of compressors, and will even develop into "corner stall" in severe cases. With the increase of stage loading of modern compressors, the negative effect of corner separation becomes so prominent as to seriously hinder the development of highly loaded compressors. Therefore, many active and passive flow control methods are widely applied to flow control of corner separation. Research progress of the mechanism of corner separation of the axial flow compressor is reviewed from three perspectives:influence of corner separation on performance of the axial flow compressor, flow field characteristics of corner separation and the criterion for corner stall. The influencing factors and the topological analysis of corner separation and the definition and judgment of corner stall are discussed. Research progress of seven flow control methods is reviewed, including three-dimensional blade design, fence/groove, vortex generator, non-axisymmetric endwall profiling, vortex generator jet, plasma aerodynamic actuation, and boundary layer suction/jet. Application of these methods too the suppression of corner separation is emphatically discussed, and the mechanism of these methods for suppression corner separation is given. The research status of corner separation is summarized. The shortcomings of current research are pointed out, and future development of this research field is described.

Key words: axial-flow compressor, corner separation, corner stall, flow field characteristics, flow control

CLC Number:

V231.3

WU Yanhui, WANG Bo, FU Yu, LIU Jun. Research progress of corner separation in axial-flow compressor[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(9): 520974-520974.

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Research progress of corner separation in axial-flow compressor

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